Academic literature on the topic '341.6/2'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic '341.6/2.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "341.6/2"

1

Yadav, Raj Singh, Ankur Dahayat, Naseer Mohammad, Fatima Shirin, and Harshita Agrahari. "Evaluation of Five DNA Extraction Methods for Dillenia pentagyna Roxb. and Hardwickia binata Roxb. Suitable for PCR Amplification." International Journal of Applied Sciences and Biotechnology 12, no. 2 (June 28, 2024): 54–61. http://dx.doi.org/10.3126/ijasbt.v12i2.64794.

Full text
Abstract:
High-quality genomic DNA extraction is crucial for the conservation of forest genetic resources, particularly for endangered species like Dillenia pentagyna Roxb. (Karmal) and Hardwickia binata Roxb. (Anjan), which hold significant value in traditional medicine and economics. The presence of contaminants such as polysaccharides, polyphenols, and secondary metabolites in forest trees complicates the isolation of sufficient, uncontaminated DNA. In this study, we evaluated five DNA extraction protocols, including those by Doyle and Doyle (1990), Michiels et al., (2003), Porebski et al., (1997), Khanuja et al., (1999), and Deshmukh et al., (2007). Quantification and quality analysis of the extracted DNA were conducted using a Nanodrop spectrophotometer and Agarose Gel Electrophoresis. Notably, minor modifications to the CTAB-based method outlined by Doyle and Doyle (1990) significantly enhanced DNA quality. The absorbance ratio at 260/280nm indicated mean purity ratios of 1.62 for D. pentagyna and 1.7 for H. binata, with DNA concentrations recorded at 341.6 μg/ml and 317.72 μg/ml, respectively. The Doyle and Doyle (1990) method consistently produced high-quality DNA, devoid of contaminants. Subsequent PCR amplification with SSR primers confirmed the suitability of the extracted DNA, exhibiting distinct and well-defined bands. Int. J. Appl. Sci. Biotechnol. Vol 12(2): 54-61.
APA, Harvard, Vancouver, ISO, and other styles
2

Mohammed Qasim Al Nuwaini, Giyathaldeen T. Neameh, Mustafa A. Al Zubaidi Md, and Farook M. Albusultan. "Effect of intravitreal Triamcinolone (2mg) on diabetic macular oedema in the pseudophakic patient as primary treatment." International Journal of Research in Pharmaceutical Sciences 11, no. 3 (July 17, 2020): 3533–39. http://dx.doi.org/10.26452/ijrps.v11i3.2507.

Full text
Abstract:
Diabetic macular oedema is still a significant cause of vision drop in the diabetic patient with no definitive regime for treatment. This study was on the result of effects of intravitreal injection of (2mg) triamcinolone on central macular thickness measured by OCT, visual acuity and intraocular pressure in pseudophakic eyes with diabetic macular oedema as a primary treatment line followed in six months. This study is a prospective, interventional case study series. It was on patients who received intravitreal injection of Triamcinolone in a single dose of ( 2 mg/0. 05 ml). Central macular thickness by OCT, visual acuity, and intraocular pressure was measured pre-injection and 1,3,6 months after injection. This study was performed in Iraq, Baghdad, Ibn Al-Haitham Teaching Eye Hospital from October 2014 to July 2015. Results showed 25 eyes received intravitreal injection of Triamcinolone Acetoniod with pre-injection central macular thickness 597.9+98.02 µm, visual acuity 1.096+0.61 Log MAR and intraocular pressure of 16.5+ 2.53 mmHg. After six months of follow up on central macular thickness 341.6+163.1 µm, visual acuity was 0.63 + 0.40 Log MAR and IOP was 18. 04+ 5. 63mmHg. This study suggests that intravitreal injection of Triamcinolone in a dose 2mg / 0. 05ml improves both anatomical and visual outcome in 21 eyes (84%) out of 25 pseudophakic eyes with diabetic macular oedema during first six months after injection and an increase in intraocular pressure in 2 eyes (8%). The intraocular pressure was despite the use of anti-glaucoma medications during this period.
APA, Harvard, Vancouver, ISO, and other styles
3

Cortés-Pérez, Melquiades, Fernando De León-González, Fernando Paz-Pellat, Tania Leyva-Pablo, Wenceslao Santiago-García, Alejandro Ponce-Mendoza, and Mariela Fuentes Ponce. "Almacenamiento de carbono aéreo en un bosque templado de Oaxaca: manejo de alta y baja intensidad." Madera y Bosques 27, no. 4 (December 2, 2021): e2742440. http://dx.doi.org/10.21829/myb.2021.2742440.

Full text
Abstract:
El manejo forestal sustentable es una alternativa para conservar la biodiversidad, mantener la estructura forestal y, por ende, el almace­namiento de carbono. El objetivo del presente trabajo fue determinar el efecto del manejo forestal sobre la diversidad y estructura de las especies arbóreas y cuantificar el contenido de carbono almacenado en la biomasa aérea de bosques templados en tres sistemas: (1) método mexicano de ordenación de bosques irregulares (MMOBI), (2) método de desarrollo silvícola (MDS) y (3) bosque no manejado (BNM), ubi­cados en Santiago Xiacuí y Santiago Comaltepec, Oaxaca, México. Para estimar la diversidad arbórea se utilizaron índices alfa. La estruc­tura se evaluó a partir del índice de valor de importancia (IVI). El carbono almacenado en la biomasa se estimó con datos dasométricos y ecuaciones volumétricas. Se identificaron 44 especies distribuidas en 14 familias. De acuerdo con el IVI, las especies más importantes en los tres sistemas fueron Q. laurina Humb. & Bonpl. y P. patula Schiede ex Schltdl. & Cham. presentando los mayores contenidos de carbono. El sistema forestal con mayor contenido de carbono en la biomasa fue el BNM (341.6 Mg ha-1 de biomasa y 164.7 Mg ha-1 de contenido de carbono), además de presentar la densidad más alta (872 árboles ha-1). Los bosques manejados con el MMOBI tienen mayor potencial de almacenamiento de carbono respecto a los MDS, debido a que tienen mayor similitud en diversidad y densidad que un bosque no manejado.
APA, Harvard, Vancouver, ISO, and other styles
4

McDermott, Mary M., Lydia Bazzano, Charlotte A. Peterson, Robert Sufit, Luigi Ferrucci, Kathryn Domanchuk, Lihui Zhao, et al. "Effect of Telmisartan on Walking Performance in Patients With Lower Extremity Peripheral Artery Disease." JAMA 328, no. 13 (October 4, 2022): 1315. http://dx.doi.org/10.1001/jama.2022.16797.

Full text
Abstract:
ImportancePatients with lower extremity peripheral artery disease (PAD) have reduced lower extremity perfusion, impaired lower extremity skeletal muscle function, and poor walking performance. Telmisartan (an angiotensin receptor blocker) has properties that reverse these abnormalities.ObjectiveTo determine whether telmisartan improves 6-minute walk distance, compared with placebo, in patients with lower extremity PAD at 6-month follow-up.Design, Setting, and ParticipantsDouble-blind, randomized clinical trial conducted at 2 US sites and involving 114 participants. Enrollment occurred between December 28, 2015, and November 9, 2021. Final follow-up occurred on May 6, 2022.InterventionsThe trial randomized patients using a 2 × 2 factorial design to compare the effects of telmisartan plus supervised exercise vs telmisartan alone and supervised exercise alone and to compare telmisartan alone vs placebo. Participants with PAD were randomized to 1 of 4 groups: telmisartan plus exercise (n = 30), telmisartan plus attention control (n = 29), placebo plus exercise (n = 28), or placebo plus attention control (n = 27) for 6 months. The originally planned sample size was 240 participants. Due to slower than anticipated enrollment, the primary comparison was changed to the 2 combined telmisartan groups vs the 2 combined placebo groups and the target sample size was changed to 112 participants.Main Outcomes and MeasuresThe primary outcome was the 6-month change in 6-minute walk distance (minimum clinically important difference, 8-20 m). The secondary outcomes were maximal treadmill walking distance; Walking Impairment Questionnaire scores for distance, speed, and stair climbing; and the 36-Item Short-Form Health Survey physical functioning score. The results were adjusted for study site, baseline 6-minute walk distance, randomization to exercise vs attention control, sex, and history of heart failure at baseline.ResultsOf the 114 randomized patients (mean age, 67.3 [SD, 9.9] years; 46 were women [40.4%]; and 81 were Black individuals [71.1%]), 105 (92%) completed 6-month follow-up. At 6-month follow-up, telmisartan did not significantly improve 6-minute walk distance (from a mean of 341.6 m to 343.0 m; within-group change: 1.32 m) compared with placebo (from a mean of 352.3 m to 364.8 m; within-group change: 12.5 m) and the adjusted between-group difference was −16.8 m (95% CI, −35.9 m to 2.2 m; P = .08). Compared with placebo, telmisartan did not significantly improve any of the 5 secondary outcomes. The most common serious adverse event was hospitalization for PAD (ie, lower extremity revascularization, amputation, or gangrene). Three participants (5.1%) in the telmisartan group and 2 participants (3.6%) in the placebo group were hospitalized for PAD.Conclusions and RelevanceAmong patients with PAD, telmisartan did not improve 6-minute walk distance at 6-month follow-up compared with placebo. These results do not support telmisartan for improving walking performance in patients with PAD.Trial RegistrationClinicalTrials.gov Identifier: NCT02593110
APA, Harvard, Vancouver, ISO, and other styles
5

Calvet, T., M. A. Cuevas, E. Tauler, M. Labrador, Y. Haget, and E. Estop. "Crystal data for p-bromochlorobenzene/p-dibromobenzene mixed crystals at 293 K." Journal of Applied Crystallography 19, no. 3 (June 1, 1986): 202. http://dx.doi.org/10.1107/s002188988608963x.

Full text
Abstract:
The powder data for p-bromochlorobenzene/p-dibromobenzene mixed crystals [pBCB] x [pDBB]1 − x at 293 K are reported; their thermal stability at 293 K is given. Vertical diffractometer, graphite monochromator, Cu Kα, λ = 1.54056 Å. They are all isomorphous, monoclinic, P21/a with Z = 2. a = 15.176(6), b = 5.847(3), c = 4.078(2) Å, β = 112.57(3)°, V = 334.2 Å3, Dx = 1.947 Mg m−3 for [pBCB]0.90[pDBB]0.10; JCPDS No. 36-1975. a = 15.222 (7), b = 5.847 (3), c = 4.083(2) Å, β = 112.60(3)°, V = 335.5 Å3, Dx = 1.984 Mg m−3 for [pBCB]0.80[pDBB]0.20; JCPDS No. 36-1974. a = 15.260(5), b = 5.839(2), c = 4.084(2) Å, β = 112.57(1)°, V = 336.1 Å3, Dx = 2.024 Mg m−3 for [pBCB]0.70[pDBB]0.30; JCPDS No. 36-1973. a = 15.298(4), b = 5.845(3), c = 4.091(2) Å, β = 112.60(2), V = 337.7 Å3, Dx = 2.058 Mg m−3 for [pBCB]0.60[pDBB]0.40; JCPDS No. 36-1972. a = 15.340(4), b = 5.844(2), c = 4.092(2) Å, β = 112.60(2)°, V = 338.7 Å3, Dx = 2.096 Mg m−3 for [pBCB]0.50[pDBB]0.50; JCPDS No. 36-1971. a = 15.370(5), b = 5.843(2), c = 4.097(2) Å, β = 112.62(2)°, V = 339.6 Å3, Dx = 2.134 Mg m−3 for [pBCB]0.40[pDBB]0.60; JCPDS No. 36-1970. a = 15.404(6), b = 5.840(2), c = 4.100(2) Å, β = 112.67(2)°, V = 340.4 Å3, Dx = 2.172 Mg m−3 for [pBCB]0.30[pDBB]0.70; JCPDS No. 36-1969. a = 15.437(5), b = 5.842(2), c = 4.103(2) Å, β = 112.66(2)°, V = 341.4 Å3, Dx = 2.209 Mg m−3 for [pBCB]0.20[pDBB]0.80; JCPDS No. 36-1968. a = 15.468(4), b = 5.838(2), c = 4.104(2) Å, β = 112.70(2)°, V = 341.9 Å3, Dx = 2.249 Mg m−3 for [pBCB]0.10[pDBB]0.90; JCPDS No. 36-1967.
APA, Harvard, Vancouver, ISO, and other styles
6

Nadhifa, Faralia, Bakhrudin All Habsy, and Tadoer Ridjal. "KONSELING KELOMPOK REALITA UNTUK MENINGKATKAN KEDISIPLINAN BELAJAR SISWA MADRASAH IBTIDAIYAH, EFEKTIFKAH?" Perspektif Ilmu Pendidikan 34, no. 1 (April 29, 2020): 49–58. http://dx.doi.org/10.21009/pip.341.6.

Full text
Abstract:
Penelitian ini bertujuan untuk mengetahui keefektifan konseling kelompok realita dalam meningkatkan kedisipilinan siswa di sebuah Madrasah Ibtidaiyah. Penelitian ini, menggunakan rancangan eksperimen dengan desain pretest dan posttest control group. Penelitian dilaksanakan selama 6 bulan dengan menggunakan pendekatan konseling kelompok realita dengan teknik metafora dan diskusi kualitas. Data dianalisis menggunakan uji t-test. Berdasarkan hasil penelitian ditemukan bahwa konseling kelompok realita efektif untuk meningkatkan kedisiplinan belajar siswa pada Madrasah Ibtidaiyah yang dijadikan sampel penelitian. Saran dan rekomendasi dari hasil penelitian ini antara lain: 1) Guru Bimbingan dan Konseling dapat menerapkan layanan konseling kelompok ralita sebagai alternatif untuk meningkatkan kedisiplinan siswa, 2) Peneliti selanjutnya dapat menggunakan teknik lain yang relevan untuk menguji keefektifan konseling kelompok realita.
APA, Harvard, Vancouver, ISO, and other styles
7

Kuz’ma, Yu B., Yu Prots, and Yu Grin. "Crystal structure of erbium vanadium tantal boride, Er(V0.77Ta0.23)VB6." Zeitschrift für Kristallographie - New Crystal Structures 218, no. 2 (June 2003): 159–60. http://dx.doi.org/10.1524/ncrs.2003.218.2.159.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Kozak, M., M. Jaskólski, and K. H. Röhm. "Preliminary crystallographic studies of Y25F mutant of periplasmic Escherichia coli L-asparaginase." Acta Biochimica Polonica 47, no. 3 (September 30, 2000): 807–14. http://dx.doi.org/10.18388/abp.2000_3998.

Full text
Abstract:
Periplasmic Escherichia coli L-asparaginase II with Y25F mutation in the active-site cavity has been obtained by recombinant techniques. The protein was crystallized in a new hexagonal form (P6(5)22). Single crystals of this polymorph, suitable for X-ray diffraction, were obtained by vapor diffusion using 2-methyl-2,4-pentanediol as precipitant (pH 4.8). The crystals are characterized by a = 81.0, c = 341.1 A and diffract to 2.45 A resolution. The asymmetric unit contains two protein molecules arranged into an AB dimer. The physiologically relevant ABA'B' homotetramer is generated by the action of the crystallographic 2-fold axis along [1, -1, 0]. Kinetic studies show that the loss of the phenolic hydroxyl group at position 25 brought about by the replacement of Y with F strongly impairs kcat without significantly affecting Km.
APA, Harvard, Vancouver, ISO, and other styles
9

Han, Ying, Liqing Chen, Wei Liu, Xin Xin, Lingwei Meng, Xiaoyang Chu, Wei Huang, Mingji Jin, and Zhonggao Gao. "An HPLC–MS/MS method for quantitation of trelagliptin and application in a comparative pharmacokinetic study." Bioanalysis 11, no. 19 (October 2019): 1755–65. http://dx.doi.org/10.4155/bio-2018-0238.

Full text
Abstract:
Aim: A sensitive HPLC–MS/MS approach was established to quantify trelagliptin and explore the pharmacokinetic characteristics in rats for up to 7 days. Meanwhile, the pharmacokinetic differences of trelagliptin were investigated for the first time. Results/methodology: The ion pairs of m/z 358.2→341.2 for trelagliptin and m/z 340.3→116.1 for alogliptin (internal standard) were detected in positive mode. Trelagliptin displayed a good linearity in the range of 4–4000 ng/ml (r2 = 0.9997) with a mean recovery rate of 86.9–94.1%. Discussion/conclusion: Compared with normal groups, the T1/2, apparent volume of distribution, area under the curve and bioavailability in model rats were significantly increased while the apparent plasma clearance decreased. The approach is proved to be straightforward and appropriate for quantitation of trelagliptin and application in pharmacokinetics studies.
APA, Harvard, Vancouver, ISO, and other styles
10

Yadav, Raju, Kavita Arvindakshan, Balraj Singh, Rajesh Kumar Sharma, Vikash Kumawat, and Rupa Ujjawal. "Influence of Soil Physio-chemical Properties and Available Nutrient Status by Organic Growth Promoters under Pea (Pisum sativum L.) Cultivation." International Journal of Plant & Soil Science 35, no. 21 (October 26, 2023): 613–19. http://dx.doi.org/10.9734/ijpss/2023/v35i214018.

Full text
Abstract:
A field experiment was conducted at Vegetable Farm, Department of Vegetable Science, College of Horticulture and Forestry, Jhalawar (Rajasthan) during rabi season 2021-2022 on pea. The experiment consisted thirteen treatments of organic growth promoters viz. Panchagavya @ 2 %, Panchagavya @ 4%, Panchagavya @ 6 %, Jeevamrut @ 2%, Jeevamrut @ 4%, Jeevamrut @ 6 % and Brahmastra @ 2%, Brahmastra @4%, Brahmastra @6% and vermiwash @ 5%, vermiwash @10%, vermiwash @15% and Control) and laid out in randomized block design with three replications. Results revealed that the maximum pod yield (169.93 q/ha) of pea was recorded with foliar spray of Panchagavya @ 4 % over control. However, it was found at par with foliar spray of vermiwash @ 10% and vermiwash @15% on pea. The foliar spray of growth promotors did not significantly influence soil physio-chemical properties i.e. soil pH, electrical conductivity and organic carbon after harvest of the crop. The maximum available nitrogen (341.0 kg/ha) was recorded under application of Panchagavya @ 4% and minimum available nitrogen (337.2 kg/ha) in control. Available phosphorus (kg/ha) and potassium did not significantly influence by different growth promotors in the soil after harvest of the crop.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "341.6/2"

1

Schöpfel, Ann-Sophie. "La France et le procès de Tokyo : l'Engagement de diplomates et de juges français en faveur d'une justice internationale 1941-1954." Thesis, Université de Lorraine, 2017. http://www.theses.fr/2017LORR0111/document.

Full text
Abstract:
Face aux atrocités perpétrées par les armées allemandes et japonaises, les Alliés en viennent à la même conclusion durant la Seconde Guerre mondiale : la meilleure réponse à la barbarie se situe dans une justice exemplaire. Châtier les plus hauts dignitaires nazis et japonais est jugé de la plus haute importance. Ces idéaux élevés de justice se trouvent pourtant être vite compromis avec les réalités d’après-guerre. Invitée par les États-Unis à juger les grands criminels de guerre japonais, la France accepte de participer au Tribunal militaire international pour l’Extrême-Orient. De mai 1946 à décembre 1948, vingt-huit prévenus comparaissent devant un collège de juges de onze nationalités différentes pour répondre de leurs responsabilités dans la guerre du Pacifique. La présence de la France à ce procès est motivée par des enjeux politiques : le nouveau gouvernement français espère reconquérir l’Indochine ; ce procès international lui offre une scène inattendue pour affirmer son prestige en Extrême-Orient. Mais les délégués français vont se comporter de manière imprévisible à Tokyo. À partir de sources inédites, cette thèse se propose de suivre leur engagement en faveur d’une justice internationale. Elle apporte ainsi une nouvelle perspective sur le procès de Tokyo et sur l’histoire de la justice transitionnelle
Alarmed by the magnitude of the atrocities perpetrated in Europe and in Asia, the Allies demonstrated their resolve to punish those responsible for such acts in 1945. From 1945 to 1948, prominent members of Nazi Germany and the Japanese Empire were prosecuted at the Nuremberg and the Tokyo International Military Trials. In Japan, the United States invited France to participate in the Tokyo trial. This trial offered her an unexpected opportunity to build prestige in the Far East; during World War II, France had lost her richest colony, Indochina, and hoped to regain it. France wanted to prove that she was a nation of rights in Asia where decolonization was gaining ground. But it is hardly surprising that her delegates did not protect the national interest. On the contrary, they just wished to improve the fairness of the Tokyo trial. Based on unpublished sources, this thesis aims to understand their commitment to international justice. It sheds new light on the Tokyo trial and on the history of transitional justice
APA, Harvard, Vancouver, ISO, and other styles

Books on the topic "341.6/2"

1

F, Damrosch Lori, and Scheffer David, eds. Law and force in the new international order. Boulder: Westview Press, 1991.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
2

Jacob, Bercovitch, ed. Resolving international conflicts: The theory and practice of mediation. Boulder, Colo: Lynne Rienner Publishers, 1996.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
3

Jacob, Bercovitch, ed. Resolving international conflicts: The theory and practice of mediation. Boulder, Colo: Lynne Rienner Publishers, 1995.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
4

Law and Force in the New International Order. Taylor & Francis Group, 2019.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
5

Law and Force in the New International Order. Taylor & Francis Group, 2019.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
6

International Dispute Settlement. Cambridge University Press, 2017.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
7

International Dispute Settlement. Cambridge University Press, 2017.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
8

Where the world ended: Re-unification and identity in the German borderland. Berkeley, Calif: University of California Press, 1999.

Find full text
APA, Harvard, Vancouver, ISO, and other styles

Book chapters on the topic "341.6/2"

1

Jemai, Rihem, Ramzi Chalghaf, Saber Boubakri, Mohamed Amine Djebbi, Sonia Naamen, and Hafsia Ben Rhaiem and Abdesslem Ben Haj Amara. "Montmorillonite: Properties, Characteristics and its Harnessing in Environmental Applications." In Recent Advances in Montmorillonite [Working Title]. IntechOpen, 2024. http://dx.doi.org/10.5772/intechopen.1004763.

Full text
Abstract:
Montmorillonite (MMT) is a 2:1 dioctahedral clay mineral. Due to all the environmental uses, it is an adaptable clay mineral that garnered much attention. In this chapter, we will highlight the distinctive properties and special qualities of MMT and its crucial function in environmental contexts. In this chapter, we will also explore its remarkable adsorption powers to remove contaminants from water and its contribution to erosion reduction and soil stabilization. This chapter reveals through an in-depth examination how MMT promotes eco-friendly practices and offers effective solutions for reducing pollution and preserving ecological balance. Then, we merged the wide range of characteristics of MMT with the vast array of properties of starch biopolymer to prepare a nanocomposite with a high adsorption capacity. Thus, we found a large adsorption capacity of 341.9 mg/g with a removal rate of 97.7%. Furthermore, we will explore its efficacy in removing ibuprofen drug by modifying it with CTAB/ZnO nps. Additionally, its potential application in the electrochemical detection of NiO2− will be investigated through the incorporation of TiO2 and ZnO nps on MMT.
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "341.6/2"

1

Zhang, Jiecheng, George Moridis, and Thomas Blasingame. "Message-Passing-Interface MPI Parallelization of Iteratively Coupled Fluid Flow and Geomechanics Codes for the Simulation of System Behavior in Hydrate-Bearing Geologic Media." In SPE Annual Technical Conference and Exhibition. SPE, 2021. http://dx.doi.org/10.2118/206161-ms.

Full text
Abstract:
Abstract The Reservoir GeoMechanics Simulator (RGMS), a geomechanics simulator based on the finite element method and parallelized using the Message Passing Interface (MPI), is developed in this work to model the stresses and deformations in subsurface systems. RGMS can be used stand-alone, or coupled with flow and transport models. pT+H V1.5, a parallel MPI-based version of the serial T+H V1.5 code that describes mass and heat flow in hydrate-bearing porous media, is also developed. Using the fixed-stress split iterative scheme, RGMS is coupled with the pT+H V1.5 to investigate the geomechanical responses associated with gas production from hydrate accumulations. The code development and testing process involve evaluation of the parallelization and of the coupling method, as well as verification and validation of the results. The parallel performance of the codes is tested on the Ada Linux cluster of the Texas A&M High Performance Research Computing using up to 512 processors, and on a Mac Pro computer with 12 processors. The investigated problems are: Group 1: Geomechanical problems solved by RGMS in 2D Cartesian and cylindrical domains and a 3D problem, involving 4x106 and 3.375 x106 elements, respectively; Group 2: Realistic problems of gas production from hydrates using pT+H V1.5 in 2D and 3D systems with 2.45x105 and 3.6 x106 elements, respectively; Group 3: The 3D problem in Group 2 solved with the coupled RGMS-pT+H V1.5 simulator, fully accounting for geomechanics. Two domain partitioning options are investigated on the Ada Linux cluster and the Mac Pro, and the code parallel performance is monitored. On the Ada Linux cluster using 512 processors, the simulation speedups (a) of RGMS are 218.89, 188.13, and 284.70 in the Group 1 problems, (b) of pT+H V1.5 are 174.25 and 341.67 in the Group 2 cases, and (c) of the coupled simulators is 331.80 in Group 3. The results produced in this work show the necessity of using full geomechanics simulators in marine hydrate-related studies because of the associated pronounced geomechanical effects on production and displacements and (b) the effectiveness of the parallel simulators developed in this study, which can be the only realistic option in these complex simulations of large multi-dimensional domains.
APA, Harvard, Vancouver, ISO, and other styles
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography