Relevant bibliographies by topics / PFGLMS

Academic literature on the topic 'PFGLMS'

Author: Grafiati
Published: 4 June 2021
Last updated: 20 February 2023

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Journal articles on the topic "PFGLMS"

1

Hoang, Nguyen Huy, Nguyen Thi Bao Tran, Nguyen Van Thuan, and Bui Hong Thuy. "ID: 1063 Isolation and characterization of female germline stem cell derived from porcine ovary." Biomedical Research and Therapy 4, S (September 5, 2017): 145. http://dx.doi.org/10.15419/bmrat.v4is.337.

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One of the most significant finding in stem cell area in the early 21st century is the founding of female germline stem cells (FGSCs). Establishment of FGSCs allowed new possibilities for the use of them in biotechnology and medicine. Hence, the purpose of this study was to establish, characterize the porcine female germline stem cells (pFGSCs) from porcine ovary. The result revealed the success in establishing pFGSCs from ovarian tissue. Most of the pFGSCs were round shape after in vitro culture, forming groups of cells that cluster around the ovarian cells colonies. Immunofluorescent analysis of pFGSCs showed that these cells expressed germ cell and stem cell markers such as: Vasa, Stella, c-kit and Oct4. After several weeks in in vitro culture, pFGSCs increased in number without the loss of proliferative potential. Our results suggested that pFGSCs isolated from adult mammalian ovary, under appropriate conditions, could undergo proliferation.
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2

Lim, Junghwa, D. Channe Gowda, Gowdahalli Krishnegowda, and Shirley Luckhart. "Induction of Nitric Oxide Synthase in Anopheles stephensi by Plasmodium falciparum: Mechanism of Signaling and the Role of Parasite Glycosylphosphatidylinositols." Infection and Immunity 73, no. 5 (May 2005): 2778–89. http://dx.doi.org/10.1128/iai.73.5.2778-2789.2005.

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ABSTRACT Malaria parasite (Plasmodium spp.) infection in the mosquito Anopheles stephensi induces significant expression of A. stephensi nitric oxide synthase (AsNOS) in the midgut epithelium as early as 6 h postinfection and intermittently thereafter. This induction results in the synthesis of inflammatory levels of nitric oxide (NO) in the blood-filled midgut that adversely impact parasite development. In mammals, P. falciparum glycosylphosphatidylinositols (PfGPIs) can induce NOS expression in immune and endothelial cells and are sufficient to reproduce the major effects of parasite infection. These effects are mediated in part by mimicry of insulin signaling by PfGPIs. In this study, we demonstrate that PfGPIs can induce AsNOS expression in A. stephensi cells in vitro and in the midgut epithelium in vivo. Signaling by P. falciparum merozoites and PfGPIs is mediated through A. stephensi Akt/protein kinase B and a pathway involving DSOR1, a mitogen-activated protein kinase kinase, and an extracellular signal-regulated kinase. However, despite the involvement of kinases that are also associated with insulin signaling in A. stephensi cells, signaling by P. falciparum and by PfGPIs is distinctively different from signaling by insulin. Therefore, although mimicry of insulin by PfGPIs appears to be restricted to mammalian hosts of P. falciparum, the conservation of PfGPIs as a prominent parasite-derived signal of innate immunity can now be extended to include Anopheles mosquitoes, indicating that parasite signaling of innate immunity is conserved in mosquito and mammalian cells.
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Akman-Anderson, Leyla, Martin Olivier, and Shirley Luckhart. "Induction of Nitric Oxide Synthase and Activation of Signaling Proteins in Anopheles Mosquitoes by the Malaria Pigment, Hemozoin." Infection and Immunity 75, no. 8 (May 25, 2007): 4012–19. http://dx.doi.org/10.1128/iai.00645-07.

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ABSTRACT Anopheles stephensi, a major vector for malaria parasite transmission, responds to Plasmodium infection by synthesis of inflammatory levels of nitric oxide (NO), which can limit parasite development in the midgut. We have previously shown that Plasmodium falciparum glycosylphosphatidylinositols (PfGPIs) can induce A. stephensi NO synthase (AsNOS) expression in the midgut epithelium in vivo in a manner similar to the manner in which cytokines and NO are induced by PfGPIs in mammalian cells. In mosquito cells, signaling by PfGPIs and P. falciparum merozoites is mediated through Akt/protein kinase B (Akt/PKB), the mitogen-activated protein kinase kinase DSOR1, and extracellular signal-regulated kinase (ERK). In mammalian cells, a second parasite factor, malaria pigment or hemozoin (Hz), signals NOS induction through ERK- and nuclear factor kappa B-dependent pathways and has been demonstrated to be a novel proinflammatory ligand for Toll-like receptor 9. In this study, we demonstrate that Hz can also induce AsNOS gene expression in immortalized A. stephensi and Anopheles gambiae cell lines in vitro and in A. stephensi midgut tissue in vivo. In mosquito cells, Hz signaling is mediated through transforming growth factor β-associated kinase 1, Akt/PKB, ERK, and atypical protein kinase C zeta/lambda. Our results show that Hz is a prominent parasite-derived signal for Anopheles and that signaling pathways activated by PfGPIs and Hz have both unique and shared components. Together with our previous findings, our data indicate that parasite signaling of innate immunity is conserved in mosquito and mammalian cells.
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Bhat, Javaid Yousuf, Brahmanaspati Ganapathi Shastri, and Hemalatha Balaram. "Kinetic and biochemical characterization of Plasmodium falciparum GMP synthetase." Biochemical Journal 409, no. 1 (December 11, 2007): 263–73. http://dx.doi.org/10.1042/bj20070996.

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Plasmodium falciparum, the causative agent of the fatal form of malaria, synthesizes GMP primarily from IMP and, hence, needs active GMPS (GMP synthetase) for its survival. GMPS, a G-type amidotransferase, catalyses the amination of XMP to GMP with the reaction occurring in two domains, the GAT (glutamine amidotransferase) and ATPPase (ATP pyrophosphatase). The GAT domain hydrolyses glutamine to glutamate and ammonia, while the ATPPase domain catalyses the formation of the intermediate AMP-XMP from ATP and XMP. Co-ordination of activity across the two domains, achieved through channelling of ammonia from GAT to the effector domain, is the hallmark of amidotransferases. Our studies aimed at understanding the kinetic mechanism of PfGMPS (Plasmodium falciparum GMPS) indicated steady-state ordered binding of ATP followed by XMP to the ATPPase domain with glutamine binding in a random manner to the GAT domain. We attribute the irreversible, Ping Pong step seen in initial velocity kinetics to the release of glutamate before the attack of the adenyl-XMP intermediate by ammonia. Specific aspects of the overall kinetic mechanism of PfGMPS are different from that reported for the human and Escherichia coli enzymes. Unlike human GMPS, absence of tight co-ordination of activity across the two domains was evident in the parasite enzyme. Variations seen in the inhibition by nucleosides and nucleotide analogues between human GMPS and PfGMPS highlighted differences in ligand specificity that could serve as a basis for the design of specific inhibitors. The present study represents the first report on recombinant His-tagged GMPS from parasitic protozoa.
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Steffanoni, Sara, Alberto Agazzi, Daniele Laszlo, Sarah Jane Liptrott, Mara Negri, Fedro Alessandro Peccatori, and Giovanni Martinelli. "Primary Female Genital Lymphoma: Prognostic and Therapeutic Considerations." Blood 112, no. 11 (November 16, 2008): 4941. http://dx.doi.org/10.1182/blood.v112.11.4941.4941.

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Abstract Primary Female Genital Lymphoma (PFGL) is very rare, representing 1.5% of all Non-Hodgkin’s Lymphomas (NHLs) and 0.5% of female genital malignant tumours; uterus is the main commonly genital site involved by NHL. Most PFGLs are B-cell lymphomas; usually they occur in 5th decade of life. Because of PFGL rarity, a standard treatment has not been identified yet. This is a retrospective study on 20 women with PFGL, treated at European Institute of Oncology. The median age was 52 yrs (range 30–79 yrs); at diagnosis 6 pts were asymptomatic, 11 reported pelvic symptoms and 3 B symptoms. According to the International Prognostic Index, 7 pts had low, 6 intermediate, 6 high risk and one pt not known. Eleven pts had uterine involvement, with a concomitant extension to vagina in 5 of them, ovary NHL was recognised in 4 pts, vaginal NHL in 4 pts and vulvar NHL in one pt. Diffuse large B-cell NHL (DLBCL) was diagnosed in 14 pts, marginal extranodal NHL in 3 pts and follicular in 3 pts. According to Ann Arbor staging system: 8 pts were in early stage (IE–IIE) and 12 pts in stage IVE; considering FIGO system: 11 pts were in early stage (I–II), 6 pts in stage III for regional lymph node involvement and 3 in stage IV for concomitant non-genital extranodal localization; 12 pts presented with bulky disease. At diagnosis no pts had bone marrow involvement. The diagnostic biopsy was performed by endoscopy in 13 pts and by ultrasound-guided in 2 pts, whereas 5 pts underwent laparotomy. One pt with vulva-limited marginal NHL did not receive any treatment until disease progression (PD) and transformation to DLBCL. Five pts underwent laparotomy and adjuvant chemotherapy (CT) alone (n=4) or in combination with radiotherapy (RT) (n=1); 14 pts received CT alone (n=8) or in combination with RT (n=6) as first line therapy. Anthracycline-containing CT was delivered to all pts with DLBCL (n=14) and to one pt with high grade follicular NHL, 12 of them received concurrent immunotherapy anti-CD20 (Rituximab). Central nervous system (CNS) chemo-prophylaxis with i.v. high dose methotrexate was delivered to 3 pts because of advanced or bulky disease. Two pts with follicular and 2 with marginal subtype received alkylating-containing CT alone (n=2) or with Rituximab (n=2). The Overall Response Rate (ORR) to first line therapy was 80%; the response did not improve by the addition of local treatment to CT. Three pts did not response to first line therapy: one with marginal NHL in stable disease did not receive any additional treatment because of asymptomatic disease; two with DLBCL in PD underwent salvage treatment with high dose CT and died in PD, concurrent intrathecal therapy was mandatory in one pt because of CNS relapse. Three pts with follicular NHL, in response to first line therapy, relapsed: one went on to receive maintenance Rituximab, one resulted refractory to different rescue CT regimens and died in PD, one underwent autologous bone marrow transplantation obtaining CR. After a median follow up of 51 months (range 11–164 months), 17 pts are still alive: 10 in CR and 7 in PR, 3 pts died in PD. The Overall Survival (OS) at 3 and 14 yrs was 84.8% and 42.4% respectively. According to the literature the most common histological subtype of PFGL occurred in our population was DLBCL and the most frequent genital site involved was uterus (55% of cases) [Lagoo et al. 2006]. An additional local treatment did not seem to give an advantage in terms of ORR, PFS and OS in comparison with systemic therapy alone, as stated by the literature [Signorelli et al. 2006]. Concerning the pts treated with anthracycline-containing CT with or without Rituximab (n=15), 8 pts (53%) and 5 pts (33%) achieved CR and PR respectively, 2 pts (13%) had a PD during treatment, only one pt in CR relapsed after 65 months from the first line therapy. After a median follow up of 27 months 12 pts (80%) are alive, 3 (20%) died in PD. The Response Rate and OS in the subgroup of pts that received anthracycline-containing CT resulted similar to those reported in the literature [Coiffier 2002]; therefore female genital involvement by NHL doesn’t seem to represent a negative prognostic factor.
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Ishiyama, Aki, Masato Iwatsuki, Tsuyoshi Yamamoto, Hiromi Miura, Satoshi Ōmura, and Kazuhiko Otoguro. "Antimalarial tropones and their Plasmodium falciparum glyoxalase I (pfGLOI) inhibitory activity." Journal of Antibiotics 67, no. 7 (April 9, 2014): 545–47. http://dx.doi.org/10.1038/ja.2014.28.

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Li, Jun-Fei, Xiao-Rong Zheng, Hong-Yan Zhang, Chang-Ming Shen, Guo-xin Shen, and Jian-Wei Jiang. "Effects of Sensitized Sorafenib with a Paeoniflorin and Geniposide Mixture on Liver Cancer via the NF-κB-HIF-2α-SerpinB3 Pathway." Evidence-Based Complementary and Alternative Medicine 2022 (October 15, 2022): 1–11. http://dx.doi.org/10.1155/2022/1911311.

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Purpose. This study focused on determining the anticancer effect of paeoniflorin and geniposide mixture (PFGS) combined with sorafenib (Sor) in hepatocellular carcinoma (HCC) and, in particular, whether PFGS increases the antitumor effect of Sor by modulating the NF-κB/HIF-2α/SerpinB3 pathway. Methods. The H22 hepatoma tumor-bearing mouse model was treated with PFGS, Sor, and a combination of the two drugs for 12 days. The effects of PFGS combined with Sor on tumor growth and apoptosis and the expression of NF-κB, HIF-2α, and SerpinB3 in tumor tissue were assessed. In addition, Sor-resistant hepatoma cells were treated with PFGS, Sor, and the combination of the two drugs in vitro. The effects of PFGS combined with Sor on cell proliferation and invasion and the protein expression of NF-κB p65, HIF-2α, and SerpinB3 were investigated. Results. PFGS combined with Sor treatment synergistically inhibited tumor growth in HCC tumor-bearing mice. Immunostaining showed that PFGS combined with Sor treatment significantly decreased the expression of Ki-67 and obviously induced apoptosis in the tumor compared with a single treatment. Similarly, PFGS combined with Sor treatment significantly downregulated the expression of NF-κB, HIF-2α, and SerpinB3 in the tumor compared with a single treatment. Additionally, PFGS combined with Sor markedly inhibited cell proliferation and invasion and activation of the NF-κB/HIF-2α/SerpinB3 pathway in Sor-resistant hepatoma cells compared with a single treatment. Conclusion. Our study demonstrated that PFGS synergistically increased the antiliver cancer effects of Sor by lowering activation of the NF-κB/HIF-2α/SerpinB3 pathway. These findings provided a scientific foundation for clinical studies using PFGS and Sor to treat liver cancer.
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K. Singal, Sandhya, and Yagna Shukla. "Effect of Different Positions of Body in Measuring Grip Strength in Tennis Elbow." International Journal of Health Sciences and Research 12, no. 6 (June 20, 2022): 154–57. http://dx.doi.org/10.52403/ijhsr.20220620.

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Grip strength is taken as an important measure to find effect as well as affection in tennis elbow. Measuring pain free grip strength is (PFGS) an important outcome measure for Tennis Elbow (TE). The different positions of elbow give change in the value of PFGS. This study aims to examine effects of two different position of body on PFGS in tennis elbow patients. Aims: To find out better position for measuring PFGS in tennis elbow. Methods and Material: A cross sectional study done in the Physiotherapy department. Unilateral chronic tennis elbow patients were included in the study according to inclusion and exclusion criterias after getting written informed consent. Jammer hand held dynamometer was used to measure the PFGS. PFGS was measured in sitting position with elbow flexion 90° and supine lying position with elbow extension. Average of three trials was taken with rest of 1 minute in between. Results: On comparing both positions there is significant difference (p<0.05) found in PFGS measurements in male and female at 95% confidence limit. There is significant increased PFGS noted in sitting position with elbow flexion 90° than with supine lying position with elbow extension. Conclusions: There is higher comparable PFGS (6.6%) noted in sitting with elbow flexion 90° position than with supine lying with elbow extension position. So it is better to measure PFGS in sitting with elbow 90° flexion position. Key words: Pain free grip strength, supine lying, chair sitting, grip strength measurement, dynamometer.
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Kosik, Pavol, Matus Durdik, Milan Skorvaga, Daniela Klimova, Dominika Kochanova, Zlatica Cerna, Miroslav Kubes, Marek Holop, and Igor Belyaev. "Induction of AML Preleukemic Fusion Genes in HSPCs and DNA Damage Response in Preleukemic Fusion Gene Positive Samples." Antioxidants 10, no. 3 (March 18, 2021): 481. http://dx.doi.org/10.3390/antiox10030481.

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Preleukemic fusion genes (PFGs) occurring after DNA damage in hematopoietic stem progenitor cells (HSPCs) in utero often represent the initial event in the development of childhood leukemia. While the incidence of PFGs characteristic for acute lymphoblastic leukemia (ALL) was relatively well examined by several research groups and estimated to be 1–5% in umbilical cord blood (UCB) of healthy newborns, PFGs that are relevant to acute myeloid leukemia (AML) were poorly investigated. Therefore, this study is focused on the estimation of the incidence of the most frequent AML PFGs in newborns. For the first time, this study considered the inducibility of AML PFGs in different subsets of UCB HSPCs by low-dose γ-rays and also compared endogenous DNA damage, apoptosis, and reactive oxygen species (ROS) level between UCB samples containing or lacking AML PFGs. We found that: (i) the incidence of AML PFGs in UCB was 3.19% for RUNX1-RUNX1T1, 3.19% for PML-RARα, and 1.17% for KMT2A-MLLT3, (ii) 50 cGy of γ-rays did not induce RUNX1-RUNX1T1, PML-RARα, or KMT2A-MLLT3 PFGs in different subsets of sorted and expanded HSPCs, and (iii) the AML PFG+ samples accumulated the same level of endogenous DNA damage, as measured by the γH2AX/53BP1 focus formation, and also the same ROS level, and apoptosis as compared to PFG− controls. Our study provides critical insights into the prevalence of AML PFGs in UCB of newborns, without the evidence of a specific HSPC population more susceptible for PFG formation after irradiation to low-dose γ-rays or increased amount of ROS, apoptosis and DNA damage.
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Sivanerupan, S., J. L. Wilson, E. F. Gad, and N. T. K. Lam. "Drift Performance of Point Fixed Glass Façade Systems." Advances in Structural Engineering 17, no. 10 (November 2014): 1481–95. http://dx.doi.org/10.1260/1369-4332.17.10.1481.

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Glass façade systems in buildings are subject to racking actions caused by inter storey drifts from earthquakes and wind action. The performance of façade systems is dependent on the amount of imposed drift and the interaction of the glass panels with the façade structural support frames. There are two major concerns related to the glass façade system performance during and immediately after a seismic event; hazards to people from falling glass and the cost associated with building down time and repair. It was observed that earthquake damage to glass façade systems resulting from in-plane racking actions is increasingly common and yet there has been limited research published in this field. The research completed to date has mainly focused on traditional framed glass façade systems; however, the racking performance of point fixed glass façade system (PFGFS) is likely to be quite different. Therefore, the aim of the research presented in this paper is to assess the in-plane racking performance of PFGFS which is a façade system gaining popularity worldwide. Two unique full scale in-plane racking laboratory tests on typical PFGFS with different types of connections were conducted and specific racking mechanisms were identified. Sophisticated non-linear finite element models (FE models) were developed and benchmarked against experimental results with excellent correlation. Further detailed FE analyses were conducted to evaluate the individual drift contributions of each racking mechanism such as rigid body translation of the glass panels at the oversize holes for construction tolerance, spider arm rotation and spider arm deformation. It was found that most of the drift capacity is attributed to the rigid body translation at the oversize holes. In this paper, the laboratory test setup and the experimental results are discussed together with the confirmatory FE analysis results to assess the in-plane racking performance of the PFGFS.
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Dissertations / Theses on the topic "PFGLMS"

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Teekapakvisit, Chakree. "Low Complexity Adaptive Iterative Receivers for Layered Space-Time Coded and CDMA Systems." University of Sydney, 2007. http://hdl.handle.net/2123/1776.

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Doctor of Philosophy(PhD)
In this thesis, we propose and investigate promising approaches for interference mitigation in multiple input multiple output (MIMO) and code division multiple access (CDMA) systems. Future wireless communication systems will have to achieve high spectral efficiencies in order to meet increasing demands for huge data rates in emerging Internet and multimedia services. Multiuser detection and space diversity techniques are the main principles, which enable efficient use of the available spectrum. The main limitation for the applicability of the techniques in these practical systems is the high complexity of the optimal receiver structures. The research emphasis in this thesis is on the design of a low complexity interference suppression/cancellation algorithm. The most important result of our research is the novel design of interference cancellation receivers which are adaptive and iterative and which are of low computational complexity. We propose various adaptive iterative receivers, based on a joint adaptive iterative detection and decoding algorithm. The proposed receiver can effectively suppress and cancel co-channel interference from the adjacent antennas in the MIMO system with a low computation complexity. The proposed adaptive detector, based on the adaptive least mean square (LMS) algorithm, is investigated and compared with the non-adaptive iterative receiver. Since the LMS algorithm has a slow convergence speed, a partially filtered gradient LMS (PFGLMS) algorithm, which has a faster convergence speed, is proposed to improve the convergence speed of the system. The performance and computational complexity of this receiver are also considered. To further reduce the computational complexity, we apply a frequency domain adaptation technique into the adaptive iterative receivers. The system performance and complexity are investigated. It shows that the computational complexity of the frequency domain based receiver is significantly lower than that of the time domain based receiver with the same system performance. We also consider applications of MIMO techniques in CDMA systems, called MIMO-CDMA. In the MIMO-CDMA, the presence of the co-channel interference (CCI) from the adjacent antennas and multiple access interference (MAI) from other users significantly degrades the system performance. We propose an adaptive iterative receiver, which provides the capability to effectively suppress the interference and cancel the CCI from the adjacent antennas and the MAI from other users so as to improve the system performance. The proposed receiver structure is also based on a joint adaptive detection and decoding scheme. The adaptive detection scheme employs an adaptive normalized LMS algorithm operating in the time and frequency domain. We have investigated and compared their system performance and complexity. Moreover, the system performance is evaluated by using a semi-analytical approach and compared with the simulation results. The results show that there is an excellent agreement between the two approaches.
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Teekapakvisit, Chakree. "Low Complexity Adaptive Iterative Receivers for Layered Space-Time Coded and CDMA Systems." Thesis, The University of Sydney, 2006. http://hdl.handle.net/2123/1776.

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In this thesis, we propose and investigate promising approaches for interference mitigation in multiple input multiple output (MIMO) and code division multiple access (CDMA) systems. Future wireless communication systems will have to achieve high spectral efficiencies in order to meet increasing demands for huge data rates in emerging Internet and multimedia services. Multiuser detection and space diversity techniques are the main principles, which enable efficient use of the available spectrum. The main limitation for the applicability of the techniques in these practical systems is the high complexity of the optimal receiver structures. The research emphasis in this thesis is on the design of a low complexity interference suppression/cancellation algorithm. The most important result of our research is the novel design of interference cancellation receivers which are adaptive and iterative and which are of low computational complexity. We propose various adaptive iterative receivers, based on a joint adaptive iterative detection and decoding algorithm. The proposed receiver can effectively suppress and cancel co-channel interference from the adjacent antennas in the MIMO system with a low computation complexity. The proposed adaptive detector, based on the adaptive least mean square (LMS) algorithm, is investigated and compared with the non-adaptive iterative receiver. Since the LMS algorithm has a slow convergence speed, a partially filtered gradient LMS (PFGLMS) algorithm, which has a faster convergence speed, is proposed to improve the convergence speed of the system. The performance and computational complexity of this receiver are also considered. To further reduce the computational complexity, we apply a frequency domain adaptation technique into the adaptive iterative receivers. The system performance and complexity are investigated. It shows that the computational complexity of the frequency domain based receiver is significantly lower than that of the time domain based receiver with the same system performance. We also consider applications of MIMO techniques in CDMA systems, called MIMO-CDMA. In the MIMO-CDMA, the presence of the co-channel interference (CCI) from the adjacent antennas and multiple access interference (MAI) from other users significantly degrades the system performance. We propose an adaptive iterative receiver, which provides the capability to effectively suppress the interference and cancel the CCI from the adjacent antennas and the MAI from other users so as to improve the system performance. The proposed receiver structure is also based on a joint adaptive detection and decoding scheme. The adaptive detection scheme employs an adaptive normalized LMS algorithm operating in the time and frequency domain. We have investigated and compared their system performance and complexity. Moreover, the system performance is evaluated by using a semi-analytical approach and compared with the simulation results. The results show that there is an excellent agreement between the two approaches.
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Bendiksen, Bård A., Espen H. Blokkdal, and Eddy W. Hansen. "Unconsolidated material characteristics obtained by PFGNMR using (two) different probe molecules." Diffusion fundamentals 20 (2013) 83, S. 1-2, 2013. https://ul.qucosa.de/id/qucosa%3A13670.

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Bendiksen, Bård A., Espen H. Blokkdal, and Eddy W. Hansen. "Unconsolidated material characteristics obtained by PFGNMR using (two) different probe molecules." Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-183710.

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Urlaß, Sebastian. "Messung des prompten gamma-Strahlungsspektrums aus der Spontanspaltung von 242Pu." Master's thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2018. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-231979.

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Das prompte Gammatrahlungsspektrum spielt eine wichtige Rolle sowohl für die Dynamik der Kernspaltung, als auch in der Kernreaktortechnologie. In dieser Arbeit wurde das prompte Gammaspektrum aud der Spontanspaltung von 242Pu gemessen. Das Spektrum der prompten Spaltgammastrahlung wurde durch Lanthan-Bromid-Szintillatoren und High Purity Germanium (HPGe) Detektoren mit hoher Zeit- und Energieauflösung in Koinzidenz mit den Spontanspaltereignissen in einem Flugzeitexperiment nachgewiesen. Verwendet wurde dazu die am Helmholtz-Zentrum Dresden-Rossendorf entwickkelte 242Pu-Spaltionisationskammer. Die ermittelten Ergebnisse haben eine sehr viel geringere statistische Unsicherheit als vorherige Messungen. Das mit dem HPGe-Detektoren gemessene prompte Gammastrahlungsspektrum zeigt Linienstrukturen, die Rückschlüsse auf die zugrunde liegenden gamma-Übergänge in den Spaltfragmenten zulassen.
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Nikkhou, Aski Sahar. "NMR Studies of Inclusion Compounds." Doctoral thesis, Stockholm University, Department of Physical, Inorganic and Structural Chemistry, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-8223.

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This thesis presents the application of some of the NMR methods in studying host-guest complexes, mainly in solution. The general focus of the work is on investigating the reorientational dynamics of some small molecules that are bound inside cavities of larger moieties. In the current work, these moieties belong to two groups: cryptophanes and cyclodextrins. Depending on the structure of the cavities, properties of the guest molecules and the formed complexes vary. Chloroform and dichloromethane are in slow exchange between the cage-like cavity of the cryptophanes and the solvent, on the chemical shift time scale, whereas adamantanecarboxylic acid, quinuclidine and 1,7-heptanediol in complex with cyclodextrins are examples of fast exchange. Kinetics and thermodynamics of complexation are studied by measuring exchange rates and translational self-diffusion coefficients by means of 1-dimenssional exchange spectroscopy and pulsed-field gradient (PFG) NMR methods, respectively. The association constants, calculated using the above information give estimates of the thermodynamic stability of the complexes. Carbon-13 spin relaxation data were obtained using conventional relaxation experiments, such as inversion recovery and dynamic NOE, and in some cases HSQC-type (Hetereonuclear Single Quantum Correlation Spectroscopy) experiments. Motional parameters for the free and bound guest, and the host molecules were extracted using different motional models, such as Lipari-Szabo, axially symmetric rigid body, and Clore models. Comparing the overall correlation times and the order parameters of the free and bound guest with the overall correlation time of the host molecule one can estimate the degree of the motional restriction, brought by the complexation, and the coupling between the motion of the bound guest and the reorientation of the host molecule. In one case, the guest motions were also investigated inside the cavities of a solid host material.

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Urlaß, Sebastian. "Messung des prompten gamma-Strahlungsspektrums aus der Spontanspaltung von 242Pu." Master's thesis, 2017. https://tud.qucosa.de/id/qucosa%3A30713.

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Das prompte Gammatrahlungsspektrum spielt eine wichtige Rolle sowohl für die Dynamik der Kernspaltung, als auch in der Kernreaktortechnologie. In dieser Arbeit wurde das prompte Gammaspektrum aud der Spontanspaltung von 242Pu gemessen. Das Spektrum der prompten Spaltgammastrahlung wurde durch Lanthan-Bromid-Szintillatoren und High Purity Germanium (HPGe) Detektoren mit hoher Zeit- und Energieauflösung in Koinzidenz mit den Spontanspaltereignissen in einem Flugzeitexperiment nachgewiesen. Verwendet wurde dazu die am Helmholtz-Zentrum Dresden-Rossendorf entwickkelte 242Pu-Spaltionisationskammer. Die ermittelten Ergebnisse haben eine sehr viel geringere statistische Unsicherheit als vorherige Messungen. Das mit dem HPGe-Detektoren gemessene prompte Gammastrahlungsspektrum zeigt Linienstrukturen, die Rückschlüsse auf die zugrunde liegenden gamma-Übergänge in den Spaltfragmenten zulassen.
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Book chapters on the topic "PFGLMS"

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Lee, Ivan, and Ling Guan. "Centralized Peer-to-Peer Streaming with PFGS Video Codec." In Advances in Multimedia Information Processing - PCM 2004, 131–38. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-540-30541-5_17.

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"- Progressive Fine Granularity Scalable (PFGS) Coding." In Advances in Visual Data Compression and Communication, 98–123. Auerbach Publications, 2014. http://dx.doi.org/10.1201/b17220-11.

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Conference papers on the topic "PFGLMS"

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Lotfallah, Osama, Martin Reisslein, and Sethuraman Panchanathan. "Adaptive bitstream switching of pre-encoded PFGS video." In the ACM workshop. New York, New York, USA: ACM Press, 2005. http://dx.doi.org/10.1145/1099384.1099387.

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Sun, Tiantian, Jizheng Xu, Feng Wu, and Wen Gao. "An Effective Mode Decision Scheme in Macroblock-Based PFGS." In 2006 IEEE International Conference on Multimedia and Expo. IEEE, 2006. http://dx.doi.org/10.1109/icme.2006.262406.

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Olbricht, Clemens, Johannes Janicka, and Andreas Kempf. "LES as a Prediction Tool for Lifted Flames in a Model Gas Turbine Combustor." In ASME Turbo Expo 2010: Power for Land, Sea, and Air. ASMEDC, 2010. http://dx.doi.org/10.1115/gt2010-22525.

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A progress variable approach based on premixed generated manifolds (PFGM) is applied to the LES of a model gas turbine combustor that features a lifted partially premixed flame in a complex flow field. The simulations were performed using two codes with different numerical bases from Imperial College (PsiPhi) and Darmstadt (FASTEST-ECL). Based on the same combustion model, the results from both codes show excellent agreement with each other, and good agreement with the experiments. The lifted flame dynamics, mixing, and product species composition including carbon monoxide concentration are all captured, underlining that both codes can be used to successfully simulate partially premixed model gas turbine combustors.
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Zhang, Bin, Tong Wang, Chuan-gang Gu, and Zheng-yuan Dai. "A Novel Meshing Approach for Large Eddy Simulation." In ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting collocated with 8th International Conference on Nanochannels, Microchannels, and Minichannels. ASMEDC, 2010. http://dx.doi.org/10.1115/fedsm-icnmm2010-30718.

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In large eddy simulation (LES), the filtering grid scale (FGS) of LES equations is calculated generally by local mesh size. Therefore, proper LES Meshing is very decisive for better results and more economical cost. An effort was made to provide an available approach for LES meshing by turbulence theory and CFD methods. The expression for proper filtering grid scale (PFGS) was proposed on the basis of −5/3 law of inertial sub-range. A new parameter named grid ratio coefficient was put forward for the mesh adjustment. The proper mesh of LES could be built directly from the adjustment of RANS mesh. Two test cases both backward facing step flow and turbulent channel flow were provided to verify the approach. There were three kinds of mesh size, including coarse mesh for RANS (RCM), adjusted mesh for LES with the novel approach (NAM) and fine mesh for LES (LFM), employed here. The grid numbers of NAM were less than those of LFM evidently, and the results of NAM were in a good agreement with those of DNS and experiments. It was also revealed that results of NAM were very close to those of LFM. The conclusions provided positive evidences in the application of the approach.
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Aldajah, Saud, Oyelayo O. Ajayi, George R. Fenske, Claude B. Reed, and Zhiyue Xu. "Effect of Laser Glazing and Laser Shock Peening on Tribological Performance of 1080 Carbon Steel." In ASME/STLE 2004 International Joint Tribology Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/trib2004-64047.

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High-power laser surface treatments in the form of glazing, shock peening, cladding, and alloying can significantly affect material tribology. In this paper, effects of laser glazing, laser shock peening, and their combination on the tribological behavior of 1080 carbon steel were investigated. Laser glazing is a process in which a high-power laser beam melts the top layer of the surface, followed by rapid cooling and resolidification. This results in a new surface layer microstructure and properties. Laser shock peening, on the other hand, is a mechanical process in which a laser generates pressure pulses on the surface of the metal, similar to shot peening. Five conditions were evaluated: untreated (baseline), laser shock peened only (PO), laser-glazed only (GO), laser-glazed then shock peened last (GFPL), and laser shock peened then glazed last (PFGL). In pin-on-disc testing, all laser-treated surfaces reduced dry friction, with the GFPL surface having maximum friction reduction of 43%. Under lubricated conditions, all laser-treated surfaces except the PO sample lowered friction. Similarly, all glazed samples reduced wear by a factor of 2–3, while the PO sample did not change wear significantly. These tribological results are associated with changes in the near-surface microstructure and properties.
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