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Journal articles on the topic 'Stress control tube (SCT)'

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Published: 3 June 2025
Last updated: 31 July 2025

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1

Desouky, S. S., A. Z. El-Dein, El-Aal R. A. Abd, and N. A. A. El-Rahman. "A New Contribution in Reducing Electric Field Distribution Within/Around Medium Voltage Underground Cable Terminations." Engineering, Technology & Applied Science Research 7, no. 5 (2017): Engineering, Technology & Applied Science Research. https://doi.org/10.5281/zenodo.1037193.

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Ιn medium voltage cables, the stress control layers play an important part in controlling the electric field distribution around the medium voltage underground cable terminations. Underground cable accessories, used in medium voltage cable systems, need a stress control tube in order to maintain and control the insulation level which is designed for long life times. The term “electrical stress control” refers to the cable termination analysis of optimizing the electrical stress in the area of insulation shield cutback to reduce the electrical field concentration at this point in order to reduc
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2

Detterich, Jon, Adam M. Bush, Roberta Miyeko Kato, et al. "Abnormal Red Cell Deformability and Aggregation in Sickle Cell Trait." Blood 120, no. 21 (2012): 1001. http://dx.doi.org/10.1182/blood.v120.21.1001.1001.

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Abstract Abstract 1001 Introduction: SCT occurs in 8% of African Americans and is not commonly associated with clinical disease. Nonetheless, the United States Armed Forces has reported that SCT conveys a 30-fold risk of sudden cardiac arrest and a 200-fold risk from exertional rhabdomyolysis. In fact, rhabdomyolysis in athletes with SCT has been the principal cause of death in NCAA football players in the last decade, leading to recently mandated SCT testing in all Division-1 players. In SCT, RBC sickle only under extreme conditions and with slow kinetics. Therefore, rhabdomyolysis most likel
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3

Choucri, Jamal, Andrea Balbo, Federica Zanotto, et al. "Corrosion Behavior and Susceptibility to Stress Corrosion Cracking of Leaded and Lead-Free Brasses in Simulated Drinking Water." Materials 15, no. 1 (2021): 144. http://dx.doi.org/10.3390/ma15010144.

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Duplex α + β’ brasses are widely used in drinking water distribution systems for tube fittings, valves, and ancillaries because they are low cost, easy to fabricate, and exhibit high mechanical strength. However, depending on application conditions and alloy composition, they may undergo dealloying and stress corrosion cracking. In this research, three different brass types, two leaded (CW617N and CW602N) alloys and one lead-free brass (CW724R), were investigated to assess their corrosion behavior and susceptibility to stress corrosion cracking (SCC) in simulated drinking water (SDW) solutions
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4

Mascia Lopes, Flávia Cristine, Kleber Yotsumoto Fertrin, Sara T. Olalla-Saad, Fernando Ferreira Costa, and Nicola Conran. "Increased Angiogenic Activity of Plasma From Sickle Cell Disease Patients and Anti-Angiogenic Effects of Hydroxyurea: Evaluation of Capillary-Like Structure Formation of Human Umbilical Vein Endothelial Cells on Matrigel." Blood 118, no. 21 (2011): 899. http://dx.doi.org/10.1182/blood.v118.21.899.899.

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Abstract Abstract 899 Sickle cell disease (SCD) results from mutations in the β chain of hemoglobin and is associated with a complex pathophysiological process that involves endothelial activation, inflammation and oxidative stress. Several clinical aspects of SCD such as pulmonary hypertension, moyamoya vasculopathy, proliferative retinopathy and leg ulcers suggest the involvement of an unbalanced angiogenesis. Plasma levels of vascular endothelial growth factor, placenta growth factor, angiopoietin-1 and angiopoietin-2 are reportedly elevated in SCD, although the effects of these alterations
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5

Yang, Zhong Wen, Hong Bin Li, Jing Li Wang, and Zong Yue Bi. "Development of Domestic CT80S Sulfur Resistance Coiled Tubing." Materials Science Forum 913 (February 2018): 355–61. http://dx.doi.org/10.4028/www.scientific.net/msf.913.355.

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According to the demand of oil and gas field development with a small amount of hydrogen sulfide, CT80S sulfur resistance coiled tubing was developed through the raw materials and manufacturing technology. The microstructure, mechanical properties, fatigue life and corrosion resistance of the CT80S sulfur resistant coiled tubing were analyzed. The results showed that the microstructure of CT80S sulfur resistant coiled tubing was consisted of the ferrite and pearlite with the grain size of 12, banded structure of 1.0, and the inclusions was less than 1.0. The strength and hardness of the pipe m
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6

Chirico, Erica N., Cyril Martin, Camille Faës, et al. "Exercise training blunts oxidative stress in sickle cell trait carriers." Journal of Applied Physiology 112, no. 9 (2012): 1445–53. http://dx.doi.org/10.1152/japplphysiol.01452.2011.

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The aim of this study was to analyze the effects of exercise training on oxidative stress in sickle cell trait carriers. Plasma levels of oxidative stress [advanced oxidation protein products (AOPP), protein carbonyl, malondialdehyde (MDA), and nitrotyrosine], antioxidant markers [catalase, glutathione peroxidase (GPX), and superoxide dismutase (SOD)], and nitrite and nitrate (NOx) were assessed at baseline, immediately following a maximal exercise test (Tex), and during recovery (T1h, T2h, T24h) in trained (T: 8 h/wk minimum) and untrained (U: no regular physical activity) sickle cell trait (
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7

Bruzzone, Carol M., Kristal A. Newman, John D. Belcher, Clifford J. Steer, and Gregory M. Vercellotti. "Differentiation of Highly Conserved Host and Transgene mRNA in HO-1 Gene Therapy." Blood 110, no. 11 (2007): 2266. http://dx.doi.org/10.1182/blood.v110.11.2266.2266.

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Abstract Background: Heme oxygenase-1 (HO-1) is highly inducible in vitro and in vivo and appears to confer protection to cells and tissues from oxidative stress and inflammation. Marked oxidative stress and vascular inflammation are hallmarks of sickle cell disease (SCD). We have previously shown that enhanced expression of HO-1 inhibits vascular inflammation and hypoxia-induced vaso-occlusion in murine models of SCD. To further these observations, we constructed transgene forms of rat HO-1 for gene therapy in murine models of SCD. The high degree of interspecies sequence conservation makes e
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8

Lopes, Fláavia Cristine Mascia, Raquel Costa, Sara T. Olalla Saad, Raquel Soares, Fernando Ferreira Costa, and Nicola Conran. "Proangiogenic Effects of Plasma From Sickle Cell Disease Patients and Antiangiogenic Effects of Hydroxyurea: Evaluation of Invasion and Proliferation of Human Endothelial Cells and Effects of Hydroxyurea in a Mouse Matrigel Plug Neovascularization Assay." Blood 120, no. 21 (2012): 377. http://dx.doi.org/10.1182/blood.v120.21.377.377.

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Abstract Abstract 377 Sickle Cell Disease (SCD) results from mutations in the β hemoglobin chain and is associated with a complex pathophysiology that often involves recurrent vasoocclusion in association with vascular inflammation, oxidative stress, ischemia-reperfusion injury and endothelial activation. Dysregulation of angiogenesis occurs in various pathologies and a newly recognized proangiogenic state is associated with SCD. Central to the process of angiogenesis are the endothelial cells (EC) that are activated by angiogenic signals and release degrading enzymes that allow EC to migrate,
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9

Gastal, G. D., D. Scarlet, and C. Aurich. "99 Short-term storage of equine embryos at 5 or 20°C does not cause lipid peroxidation." Reproduction, Fertility and Development 32, no. 2 (2020): 175. http://dx.doi.org/10.1071/rdv32n2ab99.

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Maintaining the integrity of equine embryos during storage for transportation is essential for successful conception after transfer. During storage, reactive oxygen species may originate from embryo metabolism, causing lipid peroxidation and increasing its end product malondialdehyde (MDA); MDA is one of the important biomarkers for oxidative stress. This study aimed to evaluate the temperature curve, pH and lipid peroxidation of equine embryos stored in holding medium after 24h at 5 or 20°C. Embryos (n=33) were collected on Day 7 (n=21, 7 embryos per group) or Day 8 (n=12) after ovulation and
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10

Skaarud, Kristin J., Marianne J. Hjermstad, Asta Bye, et al. "No Effect of Individualized Nutrition on Quality of Life, Acute Graft-Versus-Host Disease or Oral Mucositis after Allogeneic Stem Cell Transplantation: A Randomized Controlled Trial." Blood 128, no. 22 (2016): 2211. http://dx.doi.org/10.1182/blood.v128.22.2211.2211.

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Abstract Introduction: Patients with hematological cancers treated with allogeneic stem cell transplantation (allo-SCT) after myeloablative conditioning are at risk of malnutrition due to inadequate energy intake. This may cause or contribute to adverse outcomes. The best way to prevent and treat malnutrition and optimize nutritional status in these patients, remains unknown. We therefore conducted a randomized controlled trial to examine the effect of an individualized nutritional intervention to optimize energy intake, on quality of life (QoL), severe acute graft-versus-host disease (aGVHD)
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11

Wood, John C., Hongqiao Zhang, Adam M. Bush, et al. "Delayed Recovery of Venous Oxygen Saturation and Lactate in SCT Subjects Following Exercise and Their Association with Red Cell Oxidative Stress." Blood 120, no. 21 (2012): 3244. http://dx.doi.org/10.1182/blood.v120.21.3244.3244.

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Abstract Abstract 3244 Introduction: The United States Armed Forces estimate that sickle cell trait (SCT) conveys a 30-fold risk of sudden cardiac death and a 200-fold risk of rhabdomyolysis following exertion in recruits during basic training. Catastrophic cardiovascular collapse in African Americans with SCT has been the leading cause of death in NCAA football players in the last decade, prompting the NCAA to make testing for SCT mandatory in all Division-1 athletes. We hypothesized that in SCT subjects that abnormal RBC metabolic reserves lead to abnormal muscle blood flow supply in exercis
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12

Sewaralthahab, Sarah S., Jiling Chou, Stephen Fernandez, Nawar Shara, and Hedy Smith. "Pregnancy Outcomes in Women with Sickle Cell Trait." Blood 138, Supplement 1 (2021): 4176. http://dx.doi.org/10.1182/blood-2021-150939.

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Abstract Introduction Sickle cell trait (SCT) is a heterozygous condition in which individuals inherit one copy of the hemoglobin S allele (Hb S) which harbors a point mutation in codon 6 of the beta globin gene and one copy of the hemoglobin A allele (Hb A). SCT is a highly prevalent state affecting 300 million people worldwide with 5.5 million births annually. Individuals with SCT are generally asymptomatic with a normal life expectancy unlike their counterparts with sickle cell disease (Hb SS). Historically, they had been considered to have a benign condition with no adverse outcomes on qua
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13

Ma, Guang, Jing Zheng, Yin E. Li, and Yi Wang. "Research on Winding Technology of Thin Helical Tube of Pd-Y Alloy." Materials Science Forum 654-656 (June 2010): 1626–29. http://dx.doi.org/10.4028/www.scientific.net/msf.654-656.1626.

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The thin helical tube of Pd-Y alloy was mainly used to high purity hydrogen preparation. The physical phenomenon was comprehensively considered during the winding process on the thin helical tube of Pd-Y alloy. Analysis the reason of wrinkling and depression is emerged on the inner of thin helix tube during the winding process on the thin helical tube of Pd-Y alloy. Stress state was analysed on the winding process of the thin helical tube through the elastoplastic finite element method; the stress distribution law was obtained. And then, the stress state was comparative studied on the thin hel
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14

C.T., Ogu, Umeh S.O., Anazodo, C.A., Ohuche J.C., and Agwuna L. "Characteristics of Saccharomyces Cerevisiae Isolated from an Indigenous Fermented Beverage (Burukutu) as Potential Brewer’s Yeast for Beer Production." International Journal of Research and Innovation in Applied Science X, no. III (2025): 661–70. https://doi.org/10.51584/ijrias.2025.10030048.

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Beer is one of the regular drinks produced and consumed in many countries including Nigeria. Its cost has become so high making it unaffordable to low income earners. One major reason for the high cost of beer is the cost of imported brewer’s yeast. The potential application of Saccharomyces cerevisiae isolated from burukutu (a Nigerian local fermented beverage drink) was investigated. The Sorghum variety used in this study was developed from Sk5192 variety obtained from the Institute of Agricultural Research Zaria, Nigeria. Burukutu sample was purchased from community market in Enugu State, N
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15

Fadheel Shanan, Wiqar, Mahdi Murshd Thuwaini, and Hasan Abd Ali Khudhair. "Vitamin E and Selenium Status as Antioxidants Biomarkers in Patients with Sickle Cell Anemia." University of Thi-Qar Journal Of Medicine 28, no. 2 (2024): 169–87. https://doi.org/10.32792/jmed.v28i2.563.

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Background: Sickle cell disease (SCD) is characterized by elevation of oxidative stress (OS) and measuring the antioxidants biomarkers like vitamin E (VE), lipid profiles, uric acid (UA), selenium (Se), and superoxide dismutase (SOD) may help to improve patients’ outcomes and disease progression and disease progression. Objective: The current study aims to detect the role of OS in SCD and the protection effect of antioxidants. Methods: A case-control study was included three study groups; sickle cell anemia (SCA), sickle cell trait (SCT), and healthy controls (HC). Colorimetric, atomic absorpt
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16

Zhao, Ren-Feng, Wei-Cheng Gao, Dong-Ya Zhang, Xu-Dong Xiao, Yan-Wei Liu, and Run-Ze Pan. "New Technology and Experimental Research on Thick-Walled Tube Fatigue Impact Loading Precision Separation." Metals 12, no. 5 (2022): 837. http://dx.doi.org/10.3390/met12050837.

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Traditional separation methods for thick-walled metal tubes include turning and sawing, which suffer from wasted raw material and low efficiency. In view of this, this paper proposes a new process of using impact load to promote crack generation and tube separation. Based on the principles of radial repeated impact load, stress concentration effect and fatigue fracture, the rapid initiation and stable expansion of tube fatigue crack are promoted. In addition, the crack initiation mechanism of the tube V-notch root cracks under radial repeated load when the tube is in a restrained state. For th
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17

Muhlemann, Joëlle K., Trenton L. B. Younts, and Gloria K. Muday. "Flavonols control pollen tube growth and integrity by regulating ROS homeostasis during high-temperature stress." Proceedings of the National Academy of Sciences 115, no. 47 (2018): E11188—E11197. http://dx.doi.org/10.1073/pnas.1811492115.

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Plant reproduction requires long-distance growth of a pollen tube to fertilize the female gametophyte. Prior reports suggested that mutations altering synthesis of flavonoids, plant specialized metabolites that include flavonols and anthocyanins, impair pollen development in several species, but the mechanism by which flavonols enhanced fertility was not defined. Here, we used genetic approaches to demonstrate that flavonols enhanced pollen development by reducing the abundance of reactive oxygen species (ROS). We further showed that flavonols reduced high-temperature stress-induced ROS accumu
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18

Ford, Andria L., Melanie E. Fields, Kristin P. Guilliams, et al. "Increased Volume and Distinct Pattern of Silent Cerebral Infarcts in Healthy, Young Adults with Sickle Cell Trait." Blood 130, Suppl_1 (2017): 757. http://dx.doi.org/10.1182/blood.v130.suppl_1.757.757.

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Abstract Background: Sickle cell trait (SCT) is common, affecting 7-8% of African Americans. Previously thought to be of little clinical consequence except under conditions of severe hypoxic/metabolic stress, recent studies have shown that SCT is independently associated with chronic vascular diseases including kidney disease, coronary artery disease, overt stroke, and pulmonary embolism. It has been postulated that SCT underlies the increased prevalence of cerebrovascular disease in African-Americans after adjusting for excess risk factors. Prospective imaging studies evaluating the natural h
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19

Kurzawa, Rafał, Wojciech Glabowski, Tomasz Baczkowski, Barbara Wiszniewska, and Mariola Marchlewicz. "Growth factors protect in vitro cultured embryos from the consequences of oxidative stress." Zygote 12, no. 3 (2004): 231–40. http://dx.doi.org/10.1017/s0967199404002783.

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The aim of the study was to evaluate the effect of insulin-like growth factors (IGF1 and IGF2), stem cell factor (SCF) and epidermal growth factor (EGF) on the development of embryos exposed to oxidative stress. C3B6F1 female mice were stimulated with 5 IU of pregnant mare serum gonadotropin and 5 IU of equine chorionic gonadotropin (eCG). Two-cell embryos were flushed out from the fallopian tubes 40 h after eCG administration and mating with DBA males. In each experiment embryos were divided into three groups and cultured in (1) control medium, (2) control medium with 0.1 mM hydrogen peroxide
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20

Desouky, S. S., A. Z. El-Dein, R. A. Abd El-Aal, and N. A. A. El-Rahman. "A New Contribution in Reducing Electric Field Distribution Within/Around Medium Voltage Underground Cable Terminations." Engineering, Technology & Applied Science Research 7, no. 5 (2017): 1962–66. http://dx.doi.org/10.48084/etasr.1357.

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Ιn medium voltage cables, the stress control layers play an important part in controlling the electric field distribution around the medium voltage underground cable terminations. Underground cable accessories, used in medium voltage cable systems, need a stress control tube in order to maintain and control the insulation level which is designed for long life times. The term “electrical stress control” refers to the cable termination analysis of optimizing the electrical stress in the area of insulation shield cutback to reduce the electrical field concentration at this point in order to reduc
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21

Samanta, Anindya, Giulia Gregori, Alessio Muzi, et al. "Optical Coherence Tomography Study of Choroidal Response to Exercise-Induced Hypertension in Chronic Central Serous Chorioretinopathy." Journal of Clinical Medicine 13, no. 21 (2024): 6580. http://dx.doi.org/10.3390/jcm13216580.

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Background/Objectives: The aim of this study was to evaluate the choroidal vascular response using optical coherence tomography (OCT) in patients with chronic central serous chorioretinopathy (CSCR) during transient increases in blood pressure. Methods: This observational, case–control study enrolled chronic CSCR patients and age-matched healthy controls. OCT scans of the macula were performed at rest and during hand-grip (HG) isometric exercise. Mean ocular perfusion pressure (MOPP) and subfoveal choroidal thickness (SCT) were measured at baseline and during stress. Quantitative OCT assessmen
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22

Kucheriava, I. M. "MODELING OF ELECTRIC FIELD IN CABLE TERMINATION WITH STRESS CONTROL TUBE." Tekhnichna Elektrodynamika 2016, no. 6 (2016): 3–9. http://dx.doi.org/10.15407/techned2016.06.003.

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23

TADANO, Yuichi, Hirohisa NOGUCHI, and Mitsutoshi KURODA. "Localization Analysis of Thin-Walled Tube using Bi-Axial Stress Control." Proceedings of Conference of Kyushu Branch 2004.57 (2004): 79–80. http://dx.doi.org/10.1299/jsmekyushu.2004.57.79.

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24

Bush, Adam M., Suvimol Sangkatumvong, Roberta Miyeko Kato, et al. "Autonomic Response to Hypoxia and Isometric Exercise in Sickle Cell Trait Subjects." Blood 120, no. 21 (2012): 3241. http://dx.doi.org/10.1182/blood.v120.21.3241.3241.

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Abstract Abstract 3241 Loss of cardiac beat to beat variability reflected by high frequency power (HFP) is a strong predictor of death in patients with cardiovascular disease. Similar autonomic dysfunction is found in patients with Sickle Cell Anemia (SCA) and can be induced by a 30 second period of hypoxia during five breath nitrogen exposure (1,2). Some data suggest that Sickle Cell Trait (SCT) carriers also exhibit autonomic dysfunction. In light of the recent attention to sudden death in young athletes with SCT we examined the autonomic response to transient hypoxia and isometric exercise
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25

Mendelsohn, Laurel G., Leah Pedoeim, Eduard J. van Beers, et al. "Effect of Aes-103 Anti-Sickling Agent On Oxygen Affinity and Stability of Red Blood Cells From Patients with Sickle Cell Anemia." Blood 120, no. 21 (2012): 85. http://dx.doi.org/10.1182/blood.v120.21.85.85.

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Abstract Abstract 85 Background: Aes-103 (5-hydroxymethylfurfural, 5-HMF) is a putative anti-sickling agent that has undergone pre-clinical testing for potential treatment for sickle cell anemia (SCA). It is an organic compound derived from dehydration of certain sugars, found commonly in small amounts in foods such as coffee and prunes. It binds to alpha subunits of hemoglobin and increases its oxygen affinity. At millimolar levels, it inhibits hypoxia-induced sickling in vitro and when dosed orally it protects sickle cell mice against hypoxia-induced death. We investigate the in vitro effect
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26

An, Jing Bo. "Test and Design of Tensile-Compression Prestressed Concrete Beam." Applied Mechanics and Materials 71-78 (July 2011): 722–27. http://dx.doi.org/10.4028/www.scientific.net/amm.71-78.722.

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In this paper, the tensile-compression prestressed concrete beam was researched, and gets deflection of the beam subjected to load. Then, the beam was analyzed by the finite element method of ANSYS software. The test and analysis results show that the beam has a good flexibility and the phenomenon of stress concentration were appeared in ends concrete of pre-compressed steel tube. The pre-compressed steel tube control stress is 0.5 times the nominal value of steel tube, the concrete pre-tensile stress can be obtained effectively by relaxes pre-compressed steel tube. This paper further optimize
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27

Shanan, Wiqar Fadheel, Mahdi Murshd Thuwaini, and Hasan Abd Ali Khudhair. "Evaluation of the Possible Pathophysiological Role of Redox Status in Patients with Sickle Cell Anemia." Journal of Applied Hematology 15, no. 3 (2024): 219–27. http://dx.doi.org/10.4103/joah.joah_45_24.

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Abstract BACKGROUND: The disease of sickle cell anemia (SCA) is an inherited blood disease that causes several complications, and oxidative stress (OS) may play a very important role in its complications and pathophysiology. OBJECTIVE: The aims of the study is to evaluate the possible pathophysiological role of some antioxidant and oxidant biomarkers within SCA patients and to evaluate the correlation of OS and atherogenic index of plasma (AIP) to predict the cardiovascular risk in SCA subjects. MATERIALS AND METHODS: A case–control research includes three study groups: SCA patients, sickle ce
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28

Yan, K., Pei Qi Ge, and Wen Bo Bi. "Study on Vibration Characteristic and Stress Intensity of Planar Elastic Tube Bundles." Materials Science Forum 628-629 (August 2009): 227–32. http://dx.doi.org/10.4028/www.scientific.net/msf.628-629.227.

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Heat transfer enhancement is achieved by flow-induced vibration in planar elastic tube bundle heat exchangers. The optimum of structural parameters of tube bundle is of importance to the characteristic and control of flow-induced vibration. The influence of pipe structural parameters such as cross section diameter, thickness and connectors mass on vibration characteristic is studied in this paper with numerical simulation method. Based on the amplitude of flow-induced vibration and stress intensity, the characteristic of planar vibration and vertical vibration are compared, and the amplitude r
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29

TADANO, Yuichi, Hirohisa NOGUCHI, and Mitsutoshi KURODA. "Plastic Instability Analysis of Thin-Walled Tube Usine Bi-Axial Stress Control." Transactions of the Japan Society of Mechanical Engineers Series A 70, no. 698 (2004): 1499–506. http://dx.doi.org/10.1299/kikaia.70.1499.

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30

Kanda, Keiichi, and Takehisa Matsuda. "In Vitro Reconstruction of Hybrid Arterial Media with Molecular and Cellular Orientations." Cell Transplantation 3, no. 6 (1994): 537–45. http://dx.doi.org/10.1177/096368979400300611.

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A hybrid medial tissue composed of a type I collagen gel, into which smooth muscle cells (SMCs) derived from bovine aortic media were 3-dimensionally (3D) embedded, was constructed around an elastomeric silicone tube (outer diameter: 8 mm). Subsequently, hybrid tissues thus prepared were subjected to three modes of mechanical stimulation in the medium: one was subjected to flotation with no disturbance (isotonic control), the second was kept isometrically (static stress) and the third was subjected to continuous periodic stretch by inflation of the embedded silicone tube which simulated arteri
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31

Yeh, Chun-Lang. "Numerical Investigation of the Effects of Steam Mole Fraction and the Inlet Velocity of Reforming Reactants on an Industrial-Scale Steam Methane Reformer." Energies 11, no. 8 (2018): 2082. http://dx.doi.org/10.3390/en11082082.

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Steam methane reforming (SMR) is the most common commercial method of industrial hydrogen production. Control of the catalyst tube temperature is a fundamental demand of the reformer design because the tube temperature must be maintained within a range that the catalysts have high activity and the tube has minor damage. In this paper, the transport and chemical reaction in an industrial-scale steam methane reformer are simulated using computational fluid dynamics (CFD). Two factors influencing the reformer temperature, hydrogen yield and stress distribution are discussed: (1) the mole fraction
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32

Li, Y. X., and G. L. Zhou. "The Sensitivity Analysis of Reliability about Large Winding Hoist Cylinder Shell." Applied Mechanics and Materials 33 (October 2010): 317–21. http://dx.doi.org/10.4028/www.scientific.net/amm.33.317.

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There are many factors that affect the safety and reliability of large winding hoist’s cylinder shell structure，and most of them are of more or less randomness，But,in the reliability analysis of tube shell structure, For factors on the tube shell vary from degrees of structural failure. Therefore, It is of great significance to study the size of the various factors that affect the reliability of the tube shell structure. In this paper, the large winding hoist cylinder shell reliability sensitivity were calculated and analyzed using the latest achievements of reliability sensitivity calculation
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33

Winter, Gerald, Jürgen Klarner, Peter Staron, Bruno Buchmayr, and Jozef Keckes. "Experimental Characterization and Modeling of Residual Stress Gradients across Straight and Bent Seamless Steel Tubes." Key Engineering Materials 651-653 (July 2015): 231–36. http://dx.doi.org/10.4028/www.scientific.net/kem.651-653.231.

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Abstract. Residual stress gradients across the wall of seamless steel tubes influence decisively the mechanical stability and reliability of automotive and industrial constructions. Irreversible bending moments imposed on the tubes induce gradual and asymmetric elasto-plastic deformation across the tube cross-sections which result in very complex residual stress distributions. The aim of this contribution is to present a novel methodology as well as complementary modeling approach to assess the three-dimensional distribution of triaxial residual stresses in bent steel tubes. The stress charact
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34

He, Xing, Junfeng Chen, Wei Tian, Yuebing Li, and Weiya Jin. "Low Cycle Fatigue Behavior of Steam Generator Tubes under Axial Loading." Materials 11, no. 10 (2018): 1944. http://dx.doi.org/10.3390/ma11101944.

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Compared with the fatigue properties of the material (Inconel Alloy 690), the real fatigue lives of tubes are more meaningful in the fatigue design and assessment of steam generator (SG) tube bundles. However, it is almost impossible to get a satisfactory result by conducting fatigue tests on the tube directly. A tube with a uniform and thin wall easily fails near the clamping ends under cyclic loading due to the stress concentration. In this research, a set-up for fatigue tests of real tubes is proposed to overcome the stress concentration. With the set-up, low cycle fatigue tests were conduc
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35

Wang, Jian Guang, Mei Zhan, Tao Huang, and He Yang. "Research on the Die Fittingness and Springback of Large Diameter Thin-Walled CT20 Titanium Alloy Tube NC Bending." Advanced Materials Research 472-475 (February 2012): 997–1002. http://dx.doi.org/10.4028/www.scientific.net/amr.472-475.997.

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The significant die unfittingness and springback, occuring during the numerically controlled (NC) bending process of large diameter thin-walled CT20 titanium alloy tube, has an obvious influence on the shape and the geometrical precision of the bent tube, furthermore on the assembly precision and the sealing capability. The changing rules of die fittingness and springback of large diameter thin-walled CT20 titanium alloy tube under different bending parameters were investigated and the mechanism was analysed using finite element method (FEM) in this paper. The result shows that the springback o
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36

Pech, Sebastian, René Richter, and Jens Lienig. "Non-occlusive pumping principle for blood pump application." at - Automatisierungstechnik 70, no. 11 (2022): 967–75. http://dx.doi.org/10.1515/auto-2021-0153.

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Abstract Roller pumps are used in medicine to pump blood in extracorporeal blood circuits. Blood is subjected to mechanical stress in these peristaltic pumps, due to the complete tube occlusion. This stress causes damage to red blood cells (hemolysis). We present a novel peristaltic pumping principle that addresses these issues. In contrast to conventional roller pumps, the tube is stimulated by a circulating eccentric oscillation. Therefore, this type of pump does not require complete tube occlusion. The blood is less mechanically stressed and hemolysis is reduced by 55% compared to a roller
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37

Dreschel, Thomas W., and John C. Sager. "Control of Water and Nutrients Using a Porous Tube: A Method for Growing Plants in Space." HortScience 24, no. 6 (1989): 944–47. http://dx.doi.org/10.21273/hortsci.24.6.944.

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Abstract A plant nutrient delivery system that uses a microporous, hydrophilic tube was developed with potential application for crop production in the microgravity of space. The tube contains a nutrient solution and delivers it to the roots. Pumps attached to the tubing create a very small suction that holds the solution within the tube. This system was used to grow wheat (Triticum aestivum cv. Yecora Rojo) for 107 days in a controlled environment at suctions of 0.40, 1.48, or 2.58 kPa. The water absorbed through the pores of the tube by baby diaper sections decreased as suction increased. Co
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38

Fang, Jun, Shi Qiang Lu, Chuang Liang, and Xu Guang Min. "Springback Behavior of High Strength Titanium Tube after Bending under Variations of Material Property Parameters." Key Engineering Materials 881 (April 2021): 13–18. http://dx.doi.org/10.4028/www.scientific.net/kem.881.13.

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In order to reveal the springback behavior of high strength TA18 tube after numerical control (NC) bending under the variations of material property parameters, the finite element (FE) model of the whole process for the high strength TA18 tube during NC bending was established under ABAQUS code and its stability was evaluated. Then, using the model, the springback behavior after tube bending under the variations of material property parameters was studied, and the significance of material property parameters on springback was revealed. The results show that the springback angle decreases with
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39

Guo, Dongming, Xinchao Kang, Zhiying Lu, and Qiyu Chen. "Mechanism and Control of Roadway Floor Rock Burst Induced by High Horizontal Stress." Shock and Vibration 2021 (July 3, 2021): 1–13. http://dx.doi.org/10.1155/2021/6745930.

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According to the characteristics of rock burst of high horizontal stress roadway floor, the rock burst mechanism of roadway floor was studied with the background of south track roadway Xing’an mine. Based on the deflection theory and energy principle of the slab, the mechanical model of the floor of the roadway under high horizontal stress was established, the stress and energy criteria of rock burst occurred in the floor of the roadway were deduced, the prevention and control measures of the floor pressure relief with large diameter borehole and concrete-filled steel tube pile support were pu
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40

Suh, Yoojin, Robert W. Motl, Connor Olsen, and Ina Joshi. "Pilot Trial of a Social Cognitive Theory-Based Physical Activity Intervention Delivered by Nonsupervised Technology in Persons With Multiple Sclerosis." Journal of Physical Activity and Health 12, no. 7 (2015): 924–30. http://dx.doi.org/10.1123/jpah.2014-0018.

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Background:Physical inactivity is prevalent in people with multiple sclerosis (MS) and this highlights the importance of developing behavioral interventions for increasing physical activity (PA) in MS. This pilot trial examined the efficacy of a 6-week, behavioral intervention based on social cognitive theory (SCT) delivered by newsletters and phone calls for increasing PA in persons with MS who were physically inactive and had middle levels of self-efficacy.Methods:The sample included 68 persons with relapsing-remitting MS who were randomly assigned into intervention and control groups. The i
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41

Maeno, Tomoyoshi, Kenichiro Mori, and Kouji Fujimoto. "Development of the Hot Gas Bulging Process for Aluminium Alloy Tube Using Resistance Heating." Key Engineering Materials 410-411 (March 2009): 315–23. http://dx.doi.org/10.4028/www.scientific.net/kem.410-411.315.

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A hot gas bulging process of an aluminium alloy tube using resistance heating, set into a forming machine, was developed. The tube was rapidly heated by the electrifying to increase the formability and to decrease the flow stress. The tube was bulged by thermally expanding the air sealed in the tube without control of internal pressure during the forming. Hot gas bulging of an aluminium alloy tube without and with axial feeding was performed. The effects of the initial internal pressure and the current on the expansion ratio of the tube were examined. The decrease in temperature around the con
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42

Cavaliere, Sara, Ignacio Jiménez-Morales, Joumada Al Cheikh, Deborah J. Jones, and Jacques Rozière. "Nanocomposite Electrodes and Membranes for PEM Electrolysis." ECS Meeting Abstracts MA2023-01, no. 36 (2023): 2074. http://dx.doi.org/10.1149/ma2023-01362074mtgabs.

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Reducing the iridium loading while keeping high mass activity and durability is one of the greatest challenges for PEMWE development.[1] Amongst the strategies to achieve this central goal, supporting iridium oxide on metal oxide supports offers high resistance to corrosion as well as electronic electrocatalyst-support interactions beneficial for catalyst activity and durability.[2] The morphology of the supports also plays a crucial role in the control of architecture and porosity of the catalyst layers. Here, tin oxide materials doped with aliovalent ions (niobium, antimony and tantalum)[3,4
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43

Safdar, Shakeel, Lin Li, M. A. Sheikh, and Zhu Liu. "The Effect of Nonconventional Laser Beam Geometries on Stress Distribution and Distortions in Laser Bending of Tubes." Journal of Manufacturing Science and Engineering 129, no. 3 (2006): 592–600. http://dx.doi.org/10.1115/1.2716715.

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Laser forming is a spring-back-free noncontact forming method that has received considerable attention in recent years. Compared to mechanical bending, no hard tooling, dies, or external force is used. Within laser forming, tube bending is an important industrial activity with applications in critical engineering systems such as heat exchangers, hydraulic systems, boilers, etc. Laser tube bending utilizes the thermal stresses generated during laser scanning to achieve the desired bends. The parameters varied to control the process are usually laser power, beam diameter, scanning velocity, and
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44

Krisdiyanto, Krisdiyanto, Rahmad Kuncoro Adi, Sudarisman Sudarisman, and Sinin Bin Hamdan. "An analysis of tube thickness effect on shell and tube heat exchanger." Eastern-European Journal of Enterprise Technologies 1, no. 8 (109) (2021): 25–35. http://dx.doi.org/10.15587/1729-4061.2021.225334.

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Heat exchangers are important equipment for the process of placing heat. The most widely used type of heat exchanger is shell and tube. This type is widely used because of its simple and easy design. Design of shell and tube heat exchangers is done by the side or shell variations to get the desired performance. Therefore, research is conducted to study the effect of tube thickness on heat transfer, pressure drop, and stress that occurs in the shell and tube heat exchanger so that the optimal tube thickness is obtained. In this research, the activities carried out are the design of heat exchang
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45

Benhizia, Abdennour, and Ilyas Bensalem. "Control of the Deformation Mode of Aluminum Foam-Filled Tubes as a Function of Foam Porosity." Materials Science Forum 1092 (June 6, 2023): 3–12. http://dx.doi.org/10.4028/p-51z089.

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This paper focuses on the computational modeling of the crashworthiness performance of designed foam-filled thin-walled tubular structures under quasi-static compression loading. The studied foam sample is designed in SolidWorks using the ‘sphere subtraction method’ and implemented as a filler material in the thin-walled tube. The quasi-static compression was simulated by Abaqus software. The foam porosity is manipulated to enhance the crashworthiness performance of empty tubes. The deformation mode and energy absorption capability of the analyzed structures are introduced in detail. The numer
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46

Liu, Xin, Yu-Zhou Zheng, Qin Fang, Heng-Bo Xiang, and Hai-Chun Yan. "Experimental Study on Influence of Microexpansive Concrete Self-Stress on Performance of Steel Pipe Concrete." Shock and Vibration 2021 (December 7, 2021): 1–10. http://dx.doi.org/10.1155/2021/8767162.

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To explore the influence of microexpansive concrete self-stress on the performance of steel pipe concrete, the expansion rate test of microexpansive concrete confined by steel tube was carried out with different expansion rates. Then, the mechanical properties of high-strength steel tube-confined microexpansive concrete (HSTCMC) short columns were conducted by the uniaxial compression test. The length-to-diameter ratio, the expansion rate of the microexpansive concrete, and the steel tube thickness were investigated in the study. Furthermore, the ABAQUS software was employed to analyze the mic
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47

Tomášek, Oldřich, Jana Albrechtová, Martina Němcová, Pavlína Opatová, and Tomáš Albrecht. "Trade-off between carotenoid-based sexual ornamentation and sperm resistance to oxidative challenge." Proceedings of the Royal Society B: Biological Sciences 284, no. 1847 (2017): 20162444. http://dx.doi.org/10.1098/rspb.2016.2444.

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It has been hypothesized that carotenoid-based sexual ornamentation signals male fertility and sperm competitive ability as both ornamentation and sperm traits may be co-affected by oxidative stress, resulting in positive covariation (the ‘redox-based phenotype-linked fertility hypothesis’; redox-based PLFH). On the other hand, the ‘sperm competition theory’ (SCT) predicts a trade-off between precopulatory and postcopulatory traits. Here, we manipulate oxidative status (using diquat dibromide) and carotenoid availability in adult zebra finch ( Taeniopygia guttata ) males in order to test wheth
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48

Bade, Simhachalam, C. Lakshmana Rao, and Krishna Srinivas. "The Effect of Holes in the Compression Behavior and Energy Absorption of Aluminum Alloy AA7005 Tube." Applied Mechanics and Materials 418 (September 2013): 196–99. http://dx.doi.org/10.4028/www.scientific.net/amm.418.196.

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In this paper, compression behavior and energy absorption of aluminum alloy AA7005 tubes in T6 with and without holes are investigated numerically. True stress-plastic strain curves from the tensile test are used in the static simulation of AA7005 tubes. The deformed modes from the numerical simulation are compared between tube with and without holes. Energy absorption values and peak loads with and without holes are compared to develop the understanding on the size of hole to be used in tube for energy absorption control.
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49

Ali, Inaam N., Muthana M. Awad, and Alaa S. Mahmood. "Effect of Methotrexate and Omega-3 Combination on Cytogenetic Changes of Bone Marrow and Some Enzymatic Antioxidants: An Experimental Study." Yemeni Journal for Medical Sciences 11, no. 1 (2017): 1–7. http://dx.doi.org/10.20428/yjms.11.1.1.

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 Introduction Methods Resuts Discussion Conclusions Acknowledgments Authors' contributions Competing interests Ethical approval References 
 
 
 
 Effect of Methotrexate and Omega-3 Combination on Cytogenetic Changes of Bone Marrow and Some Enzymatic Antioxidants: An Experimental Study
 Inaam N. Ali1, Muthana M. Awad2, Alaa S. Mahmood2,*
 1 Water and Environment Directorate, Ministry of Sciences and Technology, Baghdad, Iraq
 2 Department of Biology, College of Science, University of Anbar, Anbar, Iraq
 * Corresponding author: A. S. Mahmood
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50

Ali, Inaam N., Muthana M. Awad, and Alaa S. Mahmood. "Effect of Methotrexate and Omega-3 Combination on Cytogenetic Changes of Bone Marrow and Some Enzymatic Antioxidants: An Experimental Study." Yemeni Journal for Medical Sciences 11, no. 1 (2017): 1–7. http://dx.doi.org/10.20428/yjms.v11i1.1059.

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 Introduction Methods Resuts Discussion Conclusions Acknowledgments Authors' contributions Competing interests Ethical approval References 
 
 
 
 Effect of Methotrexate and Omega-3 Combination on Cytogenetic Changes of Bone Marrow and Some Enzymatic Antioxidants: An Experimental Study
 Inaam N. Ali1, Muthana M. Awad2, Alaa S. Mahmood2,*
 1 Water and Environment Directorate, Ministry of Sciences and Technology, Baghdad, Iraq
 2 Department of Biology, College of Science, University of Anbar, Anbar, Iraq
 * Corresponding author: A. S. Mahmood
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