Academic literature on the topic 'In situ technique'

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Journal articles on the topic "In situ technique"

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Guan, Yuduo, Bin Ai, Zengyao Wang, Chong Chen, Wei Zhang, Yu Wang, and Gang Zhang. "In Situ Chemical Patterning Technique." Advanced Functional Materials 32, no. 2 (October 7, 2021): 2107945. http://dx.doi.org/10.1002/adfm.202107945.

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Hsu, Chun‐Wei, and Peter R. Kinget. "Digital in‐situ biasing technique." Electronics Letters 51, no. 12 (June 2015): 897–99. http://dx.doi.org/10.1049/el.2015.0649.

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Updegraff, Stephen A., and Michiel S. Kritzinger. "Laser in situ keratomileusis technique." Current Opinion in Ophthalmology 11, no. 4 (August 2000): 267–72. http://dx.doi.org/10.1097/00055735-200008000-00008.

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Sadigh, Parviz Lionel, Li-Ren Chang, Kuan-Ming Feng, and Seng-Feng Jeng. "The “In Situ Molding Technique." Journal of Craniofacial Surgery 25, no. 5 (September 2014): 1766–68. http://dx.doi.org/10.1097/scs.0000000000000884.

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Banish, R. Michael, and Lyle B. Jalbert. "In-situ diffusivity measurement technique." Advances in Space Research 24, no. 10 (January 1999): 1311–20. http://dx.doi.org/10.1016/s0273-1177(99)00739-5.

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Kamalak, A., O. Canbolat, Y. Gurbuz, and O. Ozay. "Comparison of in vitro gas production technique with in situ nylon bag technique to estimate dry matter degradation." Czech Journal of Animal Science 50, No. 2 (December 6, 2011): 60–67. http://dx.doi.org/10.17221/3996-cjas.

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Dry matter (DM) degradation of wheat straw (WS), barley straw (BS), lucerne hay (LH) and maize silage (MS) was determined using two different techniques: (i) in vitro gas production and (ii) nylon bag degradability technique. In vitro gas production and in situ DM disappearance were measured after 3, 6, 12, 24, 48, 72 and 96 hours of incubation. In situ and in vitro DM degradation kinetics was described using the equation y = a + b (1 &ndash; e<sup>ct</sup>). In all incubations there were significant (P &lt; 0.001) correlations between gas production and in situ DM disappearance or estimated parameters ((a + b)<sub>ga</sub><sub>s</sub> and (a + b)<sub>is</sub> or (a + b)<sub>gas</sub> and EDMD<sub>is</sub>) whereas there were no significant (P &gt; 0.05) correlations between c<sub>gas</sub> and c<sub>is</sub> or b<sub>gas</sub> and b<sub>is</sub>. Gas production from the insoluble fraction (b) alone explained 98.3% of the variation of EDMD. The inclusion of gas production from the quickly soluble fraction (a) and rate constant (c) of gas production in the regression equation improved the accuracy of EDMD prediction. The correlations between the results of both methodologies seem to be sufficiently strong to predict degradability parameters from gas production parameters. It was concluded that the in vitro gas production technique has good potentiality to predict in situ DM disappearance and some DM degradation parameters. &nbsp; &nbsp;
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Canavan, Megan, Dermot Daly, Andreas Rummel, Eoin K. McCarthy, Cathal McAuley, and Valeria Nicolosi. "Novel in-situ lamella fabrication technique for in-situ TEM." Ultramicroscopy 190 (July 2018): 21–29. http://dx.doi.org/10.1016/j.ultramic.2018.03.024.

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Harish, Krishnamachar, and Yagachikatte Chikkanarasaiah Madhu. "Chemoport anchoring – the in situ technique." Surgical Techniques Development 1, no. 1 (August 17, 2011): 9. http://dx.doi.org/10.4081/std.2011.e9.

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Chemoports are subcutaneously placed long term central venous access devices usually inserted under local anaesthesia. Rare complications include port inversion or <em>flip over</em>. These can be prevented by anchoring the port to the tissues at its base. We describe an <em>in situ</em> technique of port anchoring. Here, the port is first ‘fixed’ temporarily to the overlying skin by Huber needle, thus facilitating placement of fixing sutures without port manipulation. The described technique is safe and we have not encountered complications. In addition, ex - planting the port was easier due to the use of delayed absorbable sutures. It is safer to anchor the port even if the port pocket ensures that the port fits in snugly. This described technique results in minimal manipulation of portcatheter system thereby ensuring that the catheter tip which is properly placed remains unaltered.
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Prat, Dan, Eric Pridgen, Wonyong Lee, Keith L. Wapner, Wen Chao, Kathryn O'Connor, and Daniel C. Farber. "“In-Situ” Joint Preparation Technique for First Metatarsophalangeal Joint Arthrodesis: A Retrospective Comparative Study with “Flat-Cuts” Technique." Foot & Ankle Orthopaedics 7, no. 1 (January 2022): 2473011421S0040. http://dx.doi.org/10.1177/2473011421s00402.

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Category: Midfoot/Forefoot; Bunion Introduction/Purpose: The most common joint preparation techniques mentioned in literature for 1st metatarsophalangeal (MTP) joint arthrodesis are 'cup and cone' and 'flat-cuts'. A third option of an 'in-situ' technique, has rarely been studied. This study compares the clinical, radiographic, and patients-reported outcomes of 'in-situ' joint preparation with a traditional 1st MTP joint preparation technique. Methods: The 'in-situ' technique utilizes the same dorsal surgical incision as traditional techniques. Cartilage and osteophyte removal are carried out using standard techniques without the use of specific reamers or a sagittal saw. The arthrodesis is performed in-situ with the similar freedom of joint positioning as the cup and cone technique, and traditional fixation constructs are applied. In this study, A retrospective chart review was performed for patients who underwent 1st MTP joint arthrodesis between January 2015 and December 2019. The complication, revision and non-union rates were examined in a multivariable logistic regression model. Patient reported outcome were analyzed in a repeated measures general linear model. Analysis of variance and Receiver Operating Characteristic were used to assess radiographic measurements. Results: Total of 388 1st MTP joint arthrodesis cases were included. Overall, 262 'Flat-Cuts' and 126 'In-Situ' cases were analyzed. Mean follow-up time was 292 days (median 174, SD 305). Joint-preparation technique did not have statistically significant impact on union rates (p=0.311) or revision rates (p=0.898). Diabetes-Mellitus was the most powerful predictor of non-union (p<0.001, OR 6.558, 95% CI: 2.534-16.969) and revision (p=0.02, OR 3.662, 95% CI: 1.230-10.905). The rate of transfer- metatarsalgia was significantly higher in 'flat-cuts' (p=0.015, OR 6.808, 95% CI: 1.460-31.744). Visual-Analogue-Scale and PROMIS- CAT-Physical significantly improved at 6-weeks, 3-months, and at last follow-up in both techniques (p<0.001, p=0.001), and the improvement was comparable between the techniques (p=0.078, p=0.100).'In-situ' technique resulted in significantly less mean 1st- ray shortening (3.05mm vs 7.64mm, p<0.001). In a Receiver-Operating-Characteristic analysis of transfer metatarsalgia and 1st ray shortening, the optimal diagnostic cut-off was 6.87 mm (LR 1.67, AUC 0.652, p=0.005, 95% CI: 0.56-0.74). Conclusion: 'In-situ' joint preparation technique is a simple, safe, and cost-effective technique for 1st MTP joint arthrodesis. In our series, 'in-situ' technique had a similar or better complication profile than the 'flat-cuts', while providing similar patient- reported outcomes. 'In-situ' technique resulted in significantly less 1st ray shortening, which was a predictor of transfer metatarsalgia.
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Hicks, J. M. "In situ monitoring." Clinical Chemistry 31, no. 12 (December 1, 1985): 1931–35. http://dx.doi.org/10.1093/clinchem/31.12.1931.

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Abstract In situ monitoring has been increasingly accepted during the past five years. This approach has been applied to measurement of gas tensions such as pO2 and pCO2, to pH and ions, to the assessment of jaundice by measurement of bilirubin, and to analysis for 14CO2 after administration of labeled antipyrine and aminopyrine, for evaluation of hepatic damage. Various techniques have been developed for in situ monitoring: transcutaneous measurements, implantable sensors, ingestible radio-sensitive pills, and breath analysis. Here I review some of these approaches and their limitations. These limitations include the sparsity of circumstances under which the technique can be applied and the probable increase in health-care costs.
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Dissertations / Theses on the topic "In situ technique"

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Fourie, Christoffel Johannes Stephanus. "In-situ subsurface density estimations using a seismic technique." Thesis, University of Pretoria, 2007. http://hdl.handle.net/2263/23395.

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A new geophysical method was developed to satisfy a need for in-situ density measurements. Various situations, such as a gravity dam wall requires that density measurements should be done without damage to the structure. The sample volume should also not be that large in order to be sensitive enough for variations. This method measures the in-situ density of the weathered layer and other man made structures, using seismic waves in three directions. The seismic waves utilized are P-waves and S-waves. It is however surface waves that are treated like body waves because they do not separate at this shallow depth. These waves are very sensitive to the attenuation factor, which is in turn sensitive to certain physical properties of the propagation medium. This factor is utilsed when the multi layer problem is encountered. The maximum depth of exploration is 2-5m and depends solely on the seismic skin depth. This method utilises a large base plate. The source is a large sledge hammer and shots are done at each side of the base plate. Different dominant frequencies are identified and used to calculate the densities of the layers associated with that specific frequency. The velocities of the subsurface are determined by small seismic refraction surveys. The method will find application mainly in the civil and engineering geology fields. The main application will be to determine subsurface densities and small movement elasticity modulli for engineers to aid in obtaining adequate design parameters. Case studies on three different geologic environments are presented. The results indicate that this method will be useful, although certain modifications are recommended to make this method even faster and more user friendly.
Thesis (PhD)--University of Pretoria, 2009.
Geology
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Fourie, Christoffel Johannes Stephanus. "In-situ subsurface density estimations using a seismic technique." Pretoria : [s.n.], 2008. http://upetd.up.ac.za/thesis/available/etd-01162009-110629/.

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Quincey, Paul. "Production of Nb3̲Sn superconductors by the in situ technique." Thesis, University of Oxford, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.379838.

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Le, Thiez Pierre. "Modélisation numérique de la combustion in situ à co-courant /." Rueil-Malmaison : Paris : Institut français du pétrole ; diffusion Technip, 1986. http://catalogue.bnf.fr/ark:/12148/cb349661609.

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Huang, Wei. "In-situ stress determination in concrete structures by centre hole technique." Thesis, University of Portsmouth, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.442572.

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Larroumet, Damien. "Evaluation of the Raman spectroscopy technique for in situ corrosion studies." Thesis, Sheffield Hallam University, 2005. http://shura.shu.ac.uk/19941/.

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Laser Raman spectroscopy has been widely used for corrosion studies but it appeared that, in most of the cases, the sample under investigation was removed from the media in which it has been corroded prior the Raman investigation. The necessity of running 'ex situ' analysis was often due to the poor Raman response due to the absorption of the scattered light by the solution. A large number of studies have previously been conducted after increasing the amount of scattered light by using surface enhanced Raman spectroscopy. Unfortunately, removing the sample from the media in which it has been corroded, or applying metal islands onto the sample under investigation may have a significant effect on the sample's electrochemical reactions. Therefore, the objective of the current work was to evaluate the possibility of using conventional Raman spectroscopy for in situ corrosion studies. The first stage of the research was to identify the potential advantages and the limitations of the technique itself. Once these parameters were identified, it was necessary to assess the technique through different experimental tests. Two model systems, both based on pure iron wires, were exposed to 3.5 % NaCl solution. From both systems, we showed that first a layer of lepidocrocite (gamma-FeOOH) was developing with time at open circuit potential and second that the anodic reaction started with the formation of magnetite which later oxidised to lepidocrocite. Further experiments on iron, performed in three different buffer solutions (borate, carbonate and phosphate) permitted us to observe different oxidation reactions. Although no Raman data could be obtained from the iron sample immersed in borate solution, it was possible firstly to identify the reactions associated to the anodic / cathodic waves visible on the cyclic voltammograms and second to follow the development of the oxide layers and propose a model representation of the passive film. The passive film developed in phosphate buffer solution was identified as a mixture of Fe[3](PO[4])[2.]8H[2]O and FePO[4].xH[2]O. Further pitting experimental tests examined the electrochemical resistance of the passive film developed in such solution. It has therefore been shown through the series of experiments describe here that conventional Raman spectroscopy is an appropriate tool to study, in situ, corrosion processes.
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Allery, Annie. "Amplification du gène ABL par PCR in situ dans des suspensions cellulaires (contribution technique)." Bordeaux 2, 1995. http://www.theses.fr/1995BOR2P080.

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Negim, Osama Le Coustumer Philippe Mench Michel. "New technique for soil reclamation and conservation in situ stabilisation of trace elements in contaminated soils /." S. l. : S. n, 2009. http://ori-oai.u-bordeaux1.fr/pdf/2009/NEGIM_OSAMA_2009.pdf.

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Schilling, Sibylle. "Liquid in situ analytical TEM : technique development and applications to austenitic stainless steel." Thesis, University of Manchester, 2017. https://www.research.manchester.ac.uk/portal/en/theses/liquid-in-situ-analytical-tem-technique-development-and-applications-to-austenitic-stainless-steel(fd490551-7d7a-4b2e-9b1f-917b5f8165b3).html.

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Environmentally-assisted cracking (EAC) phenomena affect the in-service behaviour of austenitic stainless steels in nuclear power plants. EAC includes such degradation phenomena as Stress Corrosion Cracking (SCC) and Corrosion Fatigue (CF). Factors affecting EAC include the material type, microstructure, environment, and stress. This is an important degradation issue for both current and Gen III+ light water reactors, particularly as nuclear power plant lifetimes are extended ( > 60 years). Thus, it is important to understand the behaviour of the alloys used in light water reactors, and phenomena such as SCC to avoid failures. Although there is no agreement on the mechanism(s) of SCC, the importance of localized electrochemical reactions at the material surface is widely recognised. Considerable research has been performed on SCC and CF crack growth, but the initiation phenomena are not fully understood. In this project, novel in situ analytical TEM techniques have been developed and applied to explore localised reactions in Type 304 austenitic stainless steel. In situ transmission electron microscopy has become an increasingly important and dynamic research area in materials science with the advent of unique microscope platforms and a range of specialized in situ specimen holders. In metals research, the ability to image and perform X-ray energy dispersive spectroscopy (XED) analyses of metals in liquids are particularly important for detailed study of the metal-environment interactions with specific microstructural features. To further facilitate such studies a special hybrid specimen preparation technique involving electropolishing and FIB extraction has been developed in this thesis to enable metal specimens to be examined in the liquid cell TEM specimen holder using both distilled H2O and H2SO4 solutions. Furthermore, a novel electrode configuration has been designed to permit the localized electrochemical measurement of electron-transparent specimens in the TEM. These novel approaches have been benchmarked by extensive ex situ experiments, including both conventional electrochemical measurements and microcell measurements. The results are discussed in terms of validation of in situ test data as well as the role of the electron beam in the experiments. In situ liquid cell TEM experiments have also explored the localized dissolution of MnS inclusions in H2O, and correlated the behaviour with ex situ experiments. Based on the research performed in this thesis, in situ liquid cell and in situ electrochemical cell experiments can be used to study nanoscale reactions pertaining to corrosion and localized dissolution leading to "precursor" events for subsequent EAC phenomena.
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Rugiero, François. "Les neurones sensoriels myentériques : étude in situ par la technique de Patch Clamp." Aix-Marseille 3, 2003. http://www.theses.fr/2003AIX30042.

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Les principaux courants ioniques des neurones myentériques AH in situ ont été étudiés en patch clamp dans le duodenum de cobaye. Ih régule la résistance d'entrée des neurones AH. La conotoxine GVIA, mais pas l'agatoxine IVA, abrège le potentiel d'action et bloque l'AHP qui est donc couplée aux canaux Ca2+ de type N. Nous avons aussi découvert un courant Na+ résistant à la TTX (TTX-R INa). TTX-R INa s'active et s'inactive lentement et possède une composante persistante. La substitution du Cl-intracellulaire par le F- hyperpolarise les paramètres dépendants du voltage de TTX-R INa, lui conférant les propriétés de NaN/NaV1. 9 dans les DRG. Des expériences de RT-PCR, single cell RT-PCR et immunohistochimie indiquent que l'ARNm et la sous-unité NaV1. 9 sont présents dans les neurones AH. Dans les neurones AH, NaN présente aussi une inactivation originale associant une diminution ultra lente ( max=100 s) de NaN à un ralentissement des cinétiques d'activation (m) et d'inactivation (hf)
Whole-cell patch-clamp recordings from guinea pig duodenal myenteric neurons were used to study the major currents of AH neurons in situ. Ih contributes to the resting conductance. The conotoxin GVIA, but not the agatoxin IVA, shortens the action potentials and blocks the AHP, which is then coupled to N- type Ca2+ channels. AH neurons express a previously unreported, TTX-resistant Na+ current (TTX-R INa). TTX-R INa activates and inactivates slowly and exhibits a persistent component. Substituting intracellular F- for Cl- shifts the voltage-dependent parameters of TTX-R INa leftward, confering TTX-R INa the properties of NaN/NaV1. 9 in the DRGs. Consistently, RT-PCR, single-cell profiling and immunostaining detect NaV1. 9 mRNA and subunits in AH neurons. In AH neurons, NaN also displays an original inactivation associating an ultra slow ( max=100 s) decline of NaN with a slowing down of both activation (m) and fast inactivation (hf) kinetics
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Books on the topic "In situ technique"

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R, Uhl George, Howard Hughes Medical Institute, and Conference on In Situ Hybridization to Brain Peptide mRNAs : Problemsand Promise (1986 : Coconut Grove(Fla.)), eds. In situ hybridizationin brain. New York: Plenum, 1986.

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Morel, Gérard. In situ hybridization in electron microscopy. Boca Raton, FL: CRC Press, 2001.

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R, Uhl George, and Howard Hughes Medical Institute, eds. In situ hybridization in brain. New York: Plenum Press, 1986.

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Payne, Fred C., Ph.D., ed. In situ remediation engineering. Boca Raton, Fla: CRC Press, 2005.

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Huang, Wei. In-situ stress determination in concrete structures by centre hole technique. Portsmouth: University of Portsmouth, Dept. of Civil Engineering, 1998.

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A, Dillon-Townes Lawrence, and Langley Research Center, eds. In-situ technique for checking the calibration of platinum resistance thermometers. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1987.

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L, Valentino Karen, Eberwine James H, and Barchas Jack D. 1935-, eds. In situ hybridization: Applications to neurobiology. New York: Oxford University Press, 1987.

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Murata, Shizuaki. Riaru taimu keisoku ni yoru seimei genshō no kaiseki =: Real-time measurements on in situ analysis of life. Tōkyō: Shīemushī Shuppan, 2011.

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W, Wisden, and Morris B. J, eds. In situ hybridization protocols for the brain. London: Academic Press, 1994.

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Florian, Banhart, ed. In-situ electron microscopy at high resolution. Hackensack, NJ: World Scientific, 2008.

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Book chapters on the topic "In situ technique"

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du Sart, Desirée, and K. H. Andy Choo. "The Technique of In Situ Hybridization." In Springer Protocols Handbooks, 697–720. Totowa, NJ: Humana Press, 1998. http://dx.doi.org/10.1007/978-1-59259-642-3_51.

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Huang, J. L., and H. H. Lu. "Microstructure through Design in-situ Seeding Technique." In Multiphased Ceramic Materials, 37–43. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-642-18752-0_5.

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Broering, D. C., C. Hillert, and X. Rogiers. "Technique of left lateral in situ splitting." In Split liver transplantation, 88–95. Heidelberg: Steinkopff, 2002. http://dx.doi.org/10.1007/978-3-642-57523-5_10.

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Pellestor, Franck, Petra Paulasova, and Samir Hamamah. "PNA-FISH Technique for In Situ Assessment of Aneuploidy." In Fluorescence In Situ Hybridization (FISH) — Application Guide, 61–66. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-540-70581-9_5.

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Dey, Pranab. "Fluorescent In Situ Hybridization Techniques in Pathology: Principle, Technique and Applications." In Basic and Advanced Laboratory Techniques in Histopathology and Cytology, 213–20. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-8252-8_21.

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Dey, Pranab. "Fluorescent In Situ Hybridisation Techniques in Pathology: Principle, Technique and Applications." In Basic and Advanced Laboratory Techniques in Histopathology and Cytology, 229–39. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-6616-3_21.

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de Ville de Goyet, J. "Technique for ex situ cadaveric liver graft division." In Split liver transplantation, 75–87. Heidelberg: Steinkopff, 2002. http://dx.doi.org/10.1007/978-3-642-57523-5_9.

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Yamada, Tomonori, Takahisa Shobu, Susumu Yamashita, Akihiko Nishimura, Toshiharu Muramatsu, and Yu-ichi Komizo. "Visualization Technique for Quantitative Evaluation in Laser Welding Processes." In In-situ Studies with Photons, Neutrons and Electrons Scattering II, 201–15. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-06145-0_12.

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Rivers, Richard. "A Technique for Studying Physiologically Induced Conducted Responses In-Situ." In The Resistance Arteries, 247–58. Totowa, NJ: Humana Press, 1994. http://dx.doi.org/10.1007/978-1-4757-2296-3_23.

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Nhan, Nguyen Thanh, and Tran Van Thanh. "Improvement of Gliclazide Dissolution Rate Using In Situ Micronization Technique." In IFMBE Proceedings, 302–5. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-11776-8_73.

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Conference papers on the topic "In situ technique"

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Vakhtin, Andrei B., and Lev N. Krasnoperov. "Imaging Technique for In Situ Cloud Characterization." In CLEO: Applications and Technology. Washington, D.C.: OSA, 2019. http://dx.doi.org/10.1364/cleo_at.2019.am1k.4.

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Arora, Aman, Abhishek Dilip Bihani, Chaitanya Makarand Padalkar, Abhishek Dinesh Punase, and Samarth Dilip Patwardhan. "Sidewall Coring: Advanced In-situ Freeze-Core Technique." In International Petroleum Technology Conference. International Petroleum Technology Conference, 2011. http://dx.doi.org/10.2523/iptc-14669-ms.

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Emerson, R. N. "In Situ Repair Technique for Decayed Timber Piles." In Structures Congress 2004. Reston, VA: American Society of Civil Engineers, 2004. http://dx.doi.org/10.1061/40700(2004)65.

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Corti, M., S. Marazzini, A. Martinelli, and A. De Agostini. "Cross-Spectrum Technique For High-Sensitivity Remote Vibration Analysis By Optical Interferometry." In In Situ Industrial Applications of Optics, edited by Jean P. L. Ebbeni. SPIE, 1986. http://dx.doi.org/10.1117/12.939016.

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Zhang, Chuan, Ping Wang, and Yaolong Chen. "A novel in-situ measuring technique for aspheric surface." In International Conference on Optical Instruments and Technology (OIT2011), edited by Larry Weber, Hoi S. Kwok, Yanbing Hou, Lianxiang Yang, Chongxiu Yu, Fengzhou Fang, Albert Weckenmann, Ji Zhao, Peter Zeppenfeld, and Jack Luo. SPIE, 2011. http://dx.doi.org/10.1117/12.903600.

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Xiao, Jie. "In-Situ Subsea Processing Technique in an IOR Project." In SPE Offshore Europe Conference & Exhibition. Society of Petroleum Engineers, 2017. http://dx.doi.org/10.2118/186151-ms.

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Davies, R. J. "The Thin Flame Technique for In-Situ Combustion Simulation." In SPE Annual Technical Conference and Exhibition. Society of Petroleum Engineers, 1989. http://dx.doi.org/10.2118/19647-ms.

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Guoqiang Zhang, Kouta Tateno, Tetsuomi Sogawa, and Hideki Gotoh. "Site-defined InP/InAs heterostructure nanowires with tunable diameter by in-situ diameter-tuning technique." In 2016 Compound Semiconductor Week (CSW) [Includes 28th International Conference on Indium Phosphide & Related Materials (IPRM) & 43rd International Symposium on Compound Semiconductors (ISCS)]. IEEE, 2016. http://dx.doi.org/10.1109/iciprm.2016.7528547.

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Gisolf, Adriaan, Francois X. Dubost, Hadrien Dumont, Vladislav Achourov, Nicola Daniele, Alessia Anselmino, Ada Crottini, Nils Andre Aarseth, Per Henrik Fjeld, and Shahnawaz Molla. "In Situ Bubblepoint Measurement." In SPE Annual Technical Conference and Exhibition. SPE, 2022. http://dx.doi.org/10.2118/210280-ms.

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Abstract Representative fluid properties are required for a wide range of field life aspects such as initial sizing of reservoir hydrocarbon reserves and production planning. Fluid properties are routinely obtained from laboratory sample analysis, but some fluid properties can also be measured in situ with formation testers. A new downhole bubblepoint technique has been developed to supplement traditional downhole fluid analysis measurements. Bubble-initiation pressure is measured on reservoir fluids enabling early estimations and sample representativity. The method outlined consists of two parts: bubble generation and bubblepoint-pressure detection. After isolation of a volume of contamination-free fluid in the fluid analyzer module of a formation tester, a downhole pump is used to reduce flowline pressure at a low and precise flow rate. Bubble initiation is detected using optical spectroscopy measurements made at a 64-ms data sampling rate. Even very small bubbles scatter visible and near-infrared light directed through the flowline, ensuring that the initiation of bubbles is detected. Flowline decompression experiments are performed in minutes, at any time, and on a wide range of downhole fluids. Downhole bubblepoint pressure measurements were made on four different fluids, all from different reservoirs and regions. The gas-oil ratio of the tested fluids ranged from 500 to 1,500 scf/bbl. In each case, the downhole bubblepoint obtained from the flowline decompression experiment matched the saturation determined by constant composition expansion in the laboratory to within 50 psi. We observed that bubble initiation is first detected using near-infrared spectroscopy. As pressure drops, gas bubbles coming out of solution will increase in size, and the bubble presence becomes identifiable on other downhole sensors such as the live fluid density and fluorescence, where it manifests as signal scattering. For each of the investigated fluids, pressure and density measurements acquired while the flowline pressure is above saturation pressure are also used to compute compressibility as a function of pressure. This downhole bubblepoint pressure measurement allows optimizing real-time sampling operations, enables fluid grading and compartmentalization studies, and can be used for an early elaboration of a fluid equation of state model. The technique is well-suited for black oils and volatile oils. For heavy oil with very low gas content, the accuracy of this technique may be reduced due to the energy required to overcome the nucleation barrier. Prior documented techniques often inferred downhole bubblepoints from analysis of the rate of change of flowline pressure. Direct precise detection of the onset of gas bubble appearance without the need to divert fluid flow is shown for the first time on a wide range of fluids. The measurement accuracy is enabled by the combination of 64-ms optical spectroscopy with low and accurate decompression rates.
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Weihong, Yue, and Xu Yeqiang. "In Situ Measurement Technique of Low-Energy β-Contaminated Waste Sorting." In 2018 26th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/icone26-81341.

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Operation and decommissioning of nuclear facilities will produce radioactive waste, and different radionuclides in the waste will bring different hazards to the public and the environment. The waste would be sorted more reasonably by distinguishing different radionuclides. Yet it is still very difficult to measure directly the pure Beta radioactive waste in situ, though in situ Gamma-analytical and Alpha-waste-barrel measurement techniques have become more sophisticated. The aim is to propose a scientific technique to sort the radioactive waste in situ. This study focused on the 90Sr-contaminated material in China Institute of Atomic Energy and optimized the design of the existing solid waste disposal facilities. A novel technique to measure the radioactive waste 90Sr-90Y online was proposed, trying to sort the radioactive waste as optimally as possible to realize further separation of exemption waste. Theoretically, the exemption waste can be further sorted, and it can guide the design of radioactive waste disposal system.
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Reports on the topic "In situ technique"

1

Bilello, John C. Fabrication of High-Performance Coatings Systems via a Novel In-Situ/Ex-Situ Characterization Technique. Fort Belvoir, VA: Defense Technical Information Center, July 2001. http://dx.doi.org/10.21236/ada414044.

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Larsen, J. M., C. J. Szczepanski, P. A. Shade, R. Wheller, and S. K. Jha. Adaption of an In-Situ Microscale Tension Technique to Enable Fatigue Testing (PREPRINT). Fort Belvoir, VA: Defense Technical Information Center, August 2012. http://dx.doi.org/10.21236/ada565514.

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Addamane, Sadhvikas. Novel In-situ Patterning Technique to Fabricate Single Quantum Dots for Quantum Photonics. Office of Scientific and Technical Information (OSTI), September 2021. http://dx.doi.org/10.2172/1820004.

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DeMarle, David, and Andrew Bauer. In situ visualization with temporal caching. Engineer Research and Development Center (U.S.), January 2022. http://dx.doi.org/10.21079/11681/43042.

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In situ visualization is a technique in which plots and other visual analyses are performed in tandem with numerical simulation processes in order to better utilize HPC machine resources. Especially with unattended exploratory engineering simulation analyses, events may occur during the run, which justify supplemental processing. Sometimes though, when the events do occur, the phenomena of interest includes the physics that precipitated the events and this may be the key insight into understanding the phenomena that is being simulated. In situ temporal caching is the temporary storing of produced data in memory for possible later analysis including time varying visualization. The later analysis and visualization still occurs during the simulation run but not until after the significant events have been detected. In this article, we demonstrate how temporal caching can be used with in-line in situ visualization to reduce simulation run-time while still capturing essential simulation results.
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Bauer, Andrew, Jennifer Abras, and Nathan Hariharan. In situ and post-processing volume rendering with with Cinema. Engineer Research and Development Center (U.S.), May 2021. http://dx.doi.org/10.21079/11681/40502.

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We present a new batch volume rendering technique which alleviates the time and expertise needed by the domain scientist in order to produce quality volume rendered results. This process can be done both in situ and as a post-processing step. The advantage of performing this as an in situ process is that the user is not required to have a priori knowledge of the exact physics and how best to create a transfer function to volume render that physics during the in situ run. For the post-processing use case, the user has the ability to easily examine a wide variety of transfer functions without the tedious work of manually generating each one.
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Upadhyaya, Shrini, Dan Wolf, William J. Chancellor, Itzhak Shmulevich, and Amos Hadas. Traction-Soil Compaction Tradeoffs as a Function of Dynamic Soil-Tire Interation Due to Varying Soil and Loading Conditions. United States Department of Agriculture, October 1995. http://dx.doi.org/10.32747/1995.7612832.bard.

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The objectives of this study were to investigate soil-pneumatic tire interaction and develop traction-soil compaction prediction model. We have developed an inverse solution technique that employs a response surface methodology to determine engineering properties of soil in-situ. This technique is useful in obtaining actual properties of soil in-situ for use in traction and soil compaction studies rather than using the values obtained in the laboratory by employing remolded and/or disturbed soil samples. We have conducted extensive field tests i the U.S. to develop semi-empirical traction prediction equation for radial ply tires. A user friendly traction-soil compaction program was developed to predict tractive ability of radial ply tires using several different techniques and to estimate soil compaction induced by these tires. A traction prediction model that incorporates strain rate effects on the tractive ability of tires was developed in Israel. A mobile single wheel tester and an in-situ soil test device were developed i Israel to significantly enhance the ability of Israeli investigators to conduct traction-soil compaction research. This project has resulted in close cooperation between UCD, Technion, and ARO, which will be instrumental in future collaboration.
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Wall, M. A., T. W. Jr Barbee, and T. P. Weihs. An in situ electron microscopy technique for the study of thermally activated reactions in multilayered materials. Office of Scientific and Technical Information (OSTI), April 1995. http://dx.doi.org/10.2172/132651.

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Fisher, Karl A., Jim V. Candy, Gabe Guss, and M. J. Mathews. Evaluating Acoustic Emission Signals as an in situ process monitoring technique for Selective Laser Melting (SLM). Office of Scientific and Technical Information (OSTI), October 2016. http://dx.doi.org/10.2172/1342013.

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Nguyen, Tinh, W. Eric Byrd, Dale Bentz, and James Jr Seiler. Development of a technique for in situ measurement of water at the asphaltmodel siliceous aggregate interface. Gaithersburg, MD: National Institute of Standards and Technology, 1992. http://dx.doi.org/10.6028/nist.ir.4783.

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Paul Fallgren. Innovative Protocols for in SITU MTBE Degradation by Using Molecular Probes-An Enhanced Chemical-Bio Oxidation Technique. Office of Scientific and Technical Information (OSTI), February 2009. http://dx.doi.org/10.2172/993521.

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