Thematische Bibliographien / MNG

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Auswahl der wissenschaftlichen Literatur zum Thema „MNG“

Autor: Grafiati

Veröffentlicht am 4. Juni 2021

Zuletzt aktualisiert am 31. Juli 2024

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Zeitschriftenartikel zum Thema "MNG"

Soltani, Nader, Christy Shropshire und Peter Sikkema. „Short Communication: Influence of manganese on efficacy of glyphosate in glyphosate-resistant soybean“. Canadian Journal of Plant Science 91, Nr. 6 (01.11.2011): 1061–64. http://dx.doi.org/10.4141/cjps2011-035.

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Soltani, N., Shropshire, C. and Sikkema, P. H. 2011. Short Communication: Influence of manganese on efficacy of glyphosate in glyphosate-resistant soybean. Can. J. Plant Sci. 91: 1061–1064. Four field trials were conducted from 2007 to 2010 in Ontario to evaluate the effect of various manganese (Mn) formulations (Mn1, Ecoman 5% Mn; Mn2, MangaMax 5.5% Mn; Mn3, ManMax 5.5% Mn; Mn4, Superman 5% Mn; Mn5, Stoller This 5% Mn; Mn6, Nortrace 6% Mn-EDTA (ethylenediaminetetraacetate); Mn7, Nortrace 22% Mn and Mn8, WolfTrax 33% Mn) applied at 2.0 kg actual Mn ha−1 on glyphosate efficacy at 900 g a.e. ha−1 in glyphosate-resistant soybean. The tank mix of glyphosate plus Mn4, Mn6 or Mn8 caused as much as 6, 17 and 4% injury in soybean, respectively. There was minimal crop injury (0–1.4%) with other Mn tank mixes. The addition of Mn4 or Mn6 to glyphosate did not antagonize glyphosate efficacy on the weeds evaluated (AMARE, AMBEL, CHEAL and SETVI). The other Mn formulations antagonized glyphosate efficacy for the control of AMARE, AMBEL, CHEAL or SETVI under some environments. The addition of Mn3 or Mn6 to glyphosate reduced soybean yield as much as 15 and 10% compared with glyphosate alone, respectively. Based on these results, it is recommended that glyphosate and manganese applications be applied sequentially to avoid weed control antagonism and maximize soybean yield.

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Bae, Hyoung Eun, Yang Du, Parameswaran Hariharan, Jonas S. Mortensen, Kaavya K. Kumar, Betty Ha, Manabendra Das et al. „Asymmetric maltose neopentyl glycol amphiphiles for a membrane protein study: effect of detergent asymmetricity on protein stability“. Chemical Science 10, Nr. 4 (2019): 1107–16. http://dx.doi.org/10.1039/c8sc02560f.

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Kinkead, E. R., R. E. Wolfe, S. A. Salins, C. S. Godin, P. P. Lu, M. M. Ketcha, A. Thilagar und W. T. Brashear. „N-Methyl-N'-Nitroguanidine: Irritation, Sensitization, and Acute Oral Toxicity, Genotoxicity, and Methods for Analysis in Biological Samples“. Toxicology and Industrial Health 9, Nr. 3 (Mai 1993): 457–77. http://dx.doi.org/10.1177/074823379300900305.

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Currently. N-methyl-N'-nitroguanidine (MNG) is being considered by the U.S. Air Force Armament Laboratory for use in explosive formulations. A mammalian toxicity profile has been performed which includes the analysis of chemical impurities and an assessment of the potential for the metabolism of MNG to 1-methyl-3-nitro-1-nitrosoguanidine (MNNG). Potential in situ gastric conversion of MNG to MNNG is a toxicological concern because MNNG is both mutagenic and carcinogenic. The compound was also evaluated in several bioassays to assess its potential genotoxic activity. The acute oral toxicity was determined in male and female Fischer 344 rats administered a single dose of MNG in corn oil. The maximum suspension of MNG that could be delivered, 1 mg MNG/kg body weight, produced no signs of toxic stress during the 14-day observation period. The primary eye and skin irritation potential of MNG was determined in female New Zealand white rabbits using the Draize technique. MNG produced no irritation to intact skin but did produce mild conjunctival irritation. The response of a single guinea pig to the dermal sensitization evaluation indicated that MNG is a weak sensitizer. The results of three genetic tests indicated that MNG does not interact with genetic material. Gastric contents and feces from treated animals showed no evidence of conversion of MNG to MNNG.

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Wu, Xiaohua, Jian Xu, Yousheng Cai, Yuejun Yang, Yuancai Liu und Shugeng Cao. „Cytoprotection against Oxidative Stress by Methylnissolin-3-O-β-d-glucopyranoside from Astragalus membranaceus Mainly via the Activation of the Nrf2/HO-1 Pathway“. Molecules 26, Nr. 13 (24.06.2021): 3852. http://dx.doi.org/10.3390/molecules26133852.

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Astragalus membranaceus is a famous herb found among medicinal and food plants in East and Southeastern Asia. The Nrf2-ARE assay-guided separation of an extract from Jing liqueur led to the identification of a nontoxic Nrf2 activator, methylnissolin-3-O-β-d-glucopyranoside (MNG, a component of A. membranaceus). Nrf2 activation by MNG has not been reported before. Using Western Blot, RT-qPCR and imaging, we investigated the cytoprotective effect of MNG against hydrogen peroxide-induced oxidative stress. MNG induced the expression of Nrf2, HO-1 and NQO1, accelerated the translocation of Nrf2 into nuclei, and enhanced the phosphorylation of AKT. The MNG-induced expression of Nrf2, HO-1, and NQO1 were abolished by Nrf2 siRNA, while the MNG-induced expression of Nrf2 and HO-1 was abated and the AKT phosphorylation was blocked by LY294002 (a PI3K inhibitor). MNG reduced intracellular ROS generation. However, the protection of MNG against the H2O2 insult was reversed by Nrf2 siRNA with decreased cell viability. The enhancement of Nrf2 and HO-1 by MNG upon H2O2 injury was reduced by LY294002. These data showed that MNG protected EA.hy926 cells against oxidative damage through the Nrf2/HO-1 and at least partially the PI3K/Akt pathways.

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Rahman, Afaf N. Abdel, Basma Ahmed Elkhadrawy, Abdallah Tageldein Mansour, Heba M. Abdel-Ghany, Engy Mohamed Mohamed Yassin, Asmaa Elsayyad, Khairiah Mubarak Alwutayd, Sameh H. Ismail und Heba H. Mahboub. „Alleviating Effect of a Magnetite (Fe3O4) Nanogel against Waterborne-Lead-Induced Physiological Disturbances, Histopathological Changes, and Lead Bioaccumulation in African Catfish“. Gels 9, Nr. 8 (08.08.2023): 641. http://dx.doi.org/10.3390/gels9080641.

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Heavy metal toxicity is an important issue owing to its harmful influence on fish. Hence, this study is a pioneer attempt to verify the in vitro and in vivo efficacy of a magnetite (Fe3O4) nanogel (MNG) in mitigating waterborne lead (Pb) toxicity in African catfish. Fish (n = 160) were assigned into four groups for 45 days. The first (control) and second (MNG) groups were exposed to 0 and 1.2 mg L−1 of MNG in water. The third (Pb) and fourth (MNG + Pb) groups were exposed to 0 and 1.2 mg L−1 of MNG in water and 69.30 mg L−1 of Pb. In vitro, the MNG caused a dramatic drop in the Pb level within 120 h. The Pb-exposed group showed the lowest survival (57.5%) among the groups, with substantial elevations in hepato-renal function and lipid peroxide (MDA). Moreover, Pb exposure caused a remarkable decline in the protein-immune parameters and hepatic antioxidants, along with higher Pb residual deposition in muscles and obvious histopathological changes in the liver and kidney. Interestingly, adding aqueous MNG to Pb-exposed fish relieved these alterations and increased survivability. Thus, MNG is a novel antitoxic agent against Pb toxicity to maintain the health of C. gariepinus.

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Zafar, Ifrah, Afra Samad, Amber Haroon, Aneeqa Naz, Aqsa Bukhari, Fayyaz . und Nudrat . „Incidental Findings of Papillary Carcinoma in Thyroid Observing patients of Previously Operated Clinical Specimens of Multinodular Goiter“. Pakistan Journal of Medical and Health Sciences 17, Nr. 8 (30.08.2023): 23–25. http://dx.doi.org/10.53350/pjmhs202317823.

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Background: Papillary carcinoma is one of the common malignancy among all thyroid malignancies and constitutes about 57-75%. In most of cases this lesion is an incidental finding in biopsies specimens operated for MNG. But the incidence of papillary carcinoma in the setting of various thyroid disorders including MNG remains unclear. Hence, we conducted a study of five years from 2017 till 2021 to address this question. Aim: To rule out the incidence of Papillary Thyroid Carcinoma (PTC) especially associated connection with MNG Methodology: From retrospective study carried out in the pathology department of Ibne-Sina Hospital, Multan, the date of 631 cases of thyroid carcinomas were retrieved. All the patients underwent different thyroid surgeries. Data regarding the age, gender, clinical diagnosis as well as pathological diagnosis was recorded and results were analyzed on SPSS 25. Results: We reviewed 631 cases of thyroid and included in the analysis. Overall, n=558 cases were operated with clinical diagnosis of MNG. Among them, 54(10%) cases were reported as papillary carcinoma on the basis of histopathological examination. Conclusions: Incidentally discovered papillary thyroid carcinomas are more commonly identified in surgical specimens from cases with MNG. These findings highlighted the high risk of malignancy in MNG emphasizing on the fact that the carcinoma should never be underestimated as majority of these patients were presented with clinically diagnosis of MNG. Keywords: MNG, papillary thyroid carcinoma, malignancy

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Cho, Kyung Ho, Mohd Husri, Anowarul Amin, Kamil Gotfryd, Ho Jin Lee, Juyeon Go, Jin Woong Kim et al. „Maltose neopentyl glycol-3 (MNG-3) analogues for membrane protein study“. Analyst 140, Nr. 9 (2015): 3157–63. http://dx.doi.org/10.1039/c5an00240k.

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The hydrophobic variants of the original MNG (MNG-3-C10) were evaluated with a few membrane proteins. The optimal MNG was variable for different membrane proteins, indicative of importance of match/mismatch between detergent hydrophobicity and membrane protein propensity to aggregate and denature.

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Kwon, Hae-Jun, Sang-Wook Woo, Yong-Ju Lee, Je-Young Kim und Sung-Man Lee. „Achieving High-Performance Spherical Natural Graphite Anode through a Modified Carbon Coating for Lithium-Ion Batteries“. Energies 14, Nr. 7 (01.04.2021): 1946. http://dx.doi.org/10.3390/en14071946.

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The electrochemical performance of modified natural graphite (MNG) and artificial graphite (AG) was investigated as a function of electrode density ranging from 1.55 to 1.7 g∙cm−3. The best performance was obtained at 1.55 g∙cm−3 and 1.60 g∙cm−3 for the AG and MNG electrodes, respectively. Both AG, at a density of 1.55 g∙cm−3, and MNG, at a density of 1.60 g∙cm−3, showed quite similar performance with regard to cycling stability and coulombic efficiency during cycling at 30 and 45 °C, while the MNG electrodes at a density of 1.60 g∙cm−3 and 1.7 g∙cm−3 showed better rate performance than the AG electrodes at a density of 1.55 g∙cm−3. The superior rate capability of MNG electrodes can be explained by the following effects: first, their spherical morphology and higher electrode density led to enhanced electrical conductivity. Second, for the MNG sample, favorable electrode tortuosity was retained and thus Li+ transport in the electrode pore was not significantly affected, even at high electrode densities of 1.60 g∙cm−3 and 1.7 g∙cm−3. MNG electrodes also exhibited a similar electrochemical swelling behavior to the AG electrodes.

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Mondal, Koustav, und Chiranjib Das. „Clinicopathological and Radiological Profile of Multinodular Goitre – A Prospective Study“. Bengal Journal of Otolaryngology and Head Neck Surgery 29, Nr. 2 (27.09.2021): 164–68. http://dx.doi.org/10.47210/bjohns.2021.v29i2.479.

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Introduction Multinodular goitre (MNG) is defined as multiple palpable distinct nodules in the enlarged thyroid gland. MNG can harbour malignancy in 1-10% cases. We undertook the present study to correlate the clinical, radiological and cytological features of MNG with that of final histopathological diagnosis. Materials and Methods A prospective cohort study was done in a tertiary care hospital in northern part of West Bengal from January 2018 to December 2019. Patients aged between 12 years and 75 years, presenting with MNG on clinical examination, were included in the study. We compared the pre-operative ultrasonography (USG) of neck and fine needle aspiration cytology (FNAC) reports with post-operative histopathological examination (HPE) report. Results Among 100 patients 80 were female and 20 were male. Most patients were in 41-50 years age group. For detection of malignancy in MNG, USG had 40% sensitivity, 97.78% specificity, 66.67% positive predictive value (PPV), 93.62% negative predictive value (NPV), and 92% diagnostic accuracy. Sensitivity, specificity, PPV, NPV and diagnostic accuracy of FNAC for detection of malignancy in MNG were 20%, 93.33%, 25%, 91.3% and 86% respectively. When USG features were combined with FNAC features non-diagnostic result decreased from 6% to 2% and diagnostic accuracy for detecting malignancy in MNG increased from 86% to 90%. Conclusion USG and FNAC are complementary to each other in the diagnostic workup of MNG. USG guided FNAC is still better for reaching final diagnosis and exclusion of malignancy.

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Md, Shadab, Nabil A. Alhakamy, Thikryat Neamatallah, Samah Alshehri, Md Ali Mujtaba, Yassine Riadi, Ammu K. Radhakrishnan, Habibullah Khalilullah, Manish Gupta und Md Habban Akhter. „Development, Characterization, and Evaluation of α-Mangostin-Loaded Polymeric Nanoparticle Gel for Topical Therapy in Skin Cancer“. Gels 7, Nr. 4 (24.11.2021): 230. http://dx.doi.org/10.3390/gels7040230.

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The aim of this study was to prepare and evaluate α-mangostin-loaded polymeric nanoparticle gel (α-MNG-PLGA) formulation to enhance α-mangostin delivery in an epidermal carcinoma. The poly (D, L-lactic-co-glycolic acid) (PLGA) nanoparticles (NPs) were developed using the emulsion–diffusion–evaporation technique with a 3-level 3-factor Box–Behnken design. The NPs were characterized and evaluated for particle size distribution, zeta potential (mV), drug release, and skin permeation. The formulated PLGA NPs were converted into a preformed carbopol gel base and were further evaluated for texture analysis, the cytotoxic effect of PLGA NPs against B16-F10 melanoma cells, and in vitro radical scavenging activity. The nanoscale particles were spherical, consistent, and average in size (168.06 ± 17.02 nm), with an entrapment efficiency (EE) of 84.26 ± 8.23% and a zeta potential of −25.3 ± 7.1 mV. Their drug release percentages in phosphate-buffered solution (PBS) at pH 7.4 and pH 6.5 were 87.07 ± 6.95% and 89.50 ± 9.50%, respectively. The release of α-MNG from NPs in vitro demonstrated that the biphasic release system, namely, immediate release in the initial phase, was accompanied by sustained drug release. The texture study of the developed α-MNG-PLGA NPs gel revealed its characteristics, including viscosity, hardness, consistency, and cohesiveness. The drug flux from α-MNG-PLGA NPs gel and α-MNG gel was 79.32 ± 7.91 and 16.88 ± 7.18 µg/cm2/h in 24 h, respectively. The confocal study showed that α-MNG-PLGA NPs penetrated up to 230.02 µm deep into the skin layer compared to 15.21 µm by dye solution. MTT assay and radical scavenging potential indicated that α-MNG-PLGA NPs gel had a significant cytotoxic effect and antioxidant effect compared to α-MNG gel (p < 0.05). Thus, using the developed α-MNG-PLGA in treating skin cancer could be a promising approach.

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Dissertationen zum Thema "MNG"

Louw, Lilly-Ann. „Analysis of an 18kb accessory region of plasmid pTcM1 from Acidithiobacillus caldus MNG“. Thesis, Stellenbosch : University of Stellenbosch, 2009. http://hdl.handle.net/10019.1/1667.

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Thesis (MSc (Microbiology))--University of Stellenbosch, 2009.
Biomining organisms are generally found in metal-rich, inorganic environments such as iron and sulfur containing ores; where they play a vital role in mineralization and decomposition of minerals. They are typically obligatory acidophilic, mesophilic or thermophilic, autotrophic, usually aerobic, iron-or sulfur oxidizing chemolithotrophic bacteria. The most prominent biomining organisms used in bioleaching of metal sulfides are Acidithiobacillus ferrooxidans, At. thiooxidans, At. caldus, Sulfobacillus spp. and Leptospirillum spp. Biomining enables us to utilize low grade ores that would not have been utilized by conventional methods of mining. Research has focused on the backbone features of plasmids isolated from bacteria of biomining environments. The aim of this study is to sequence and analyze an 18 kb region of the 66 kb plasmid pTcM1 isolated from At. caldus MNG, focusing on accessory genes carried by this plasmid. Fifteen putative genes / open reading frames were identified with functions relating to metabolism and transport systems. The genes are located in two divergently located operons. The first operon carries features related to general metabolism activities and consists of a transcriptional regulator (ORF 2), a succinate / fumarate dehydrogenase-like subunit (ORF 3), two ferredoxin genes (ORF 4 and ORF 7), a putative HEAT-like repeat (ORF 6) which is interrupted by an insertion sequence (ORF 5) and a GOGAT-like subunit (ORF 8). The second operon contains an ABC-type nitrate / sulfonate bicarbonate-like gene (ORF 9), a binding protein-dependent inner membrane component-like gene, another ABC sulfonate / nitrate-like gene (ORF 12i and 12ii) which is interrupted by an insertion sequence (ORF 13) and two hypothetical proteins with unknown functions (ORF 14 and ORF 15). Southern hybridization analysis have shown that most of the genes from the two operons are found in other At caldus strains #6, “f”, C-SH12 and BC13 from different geographical locations. Expression of the GOGAT-like subunit and the succinate / fumarate-like subunit was demonstrated in At. caldus MNG showing that these genes are functional and actively transcribed. The transcriptional regulator (ORF 2) has been shown to repress the downstream genes of putative operon 1. The persistence of these genes on plasmids together with the fact that they are being expressed, represents a potential metabolic burden, which begs the question why they have been maintained on the plasmid from geographically separated strains (and perhaps also growing under very different nutrient availability conditions) and therefore what possible role they may play.

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Fredén, Linnéa. „Characterization of the fusion protein mNG-Aβ1-42 as a fluorescence reporter probe for amyloid structure“. Thesis, Linköpings universitet, Institutionen för fysik, kemi och biologi, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-167167.

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Alzheimer’s Disease, also called AD, is a horrible, degenerative brain disease that more than 35 million people over the world have. Today, there is no cure for this disease, only treatments that are temporarily relieving the symptoms. The two proteins that is thought to be the main cause of AD is amyloid β (Aβ) and tau. Previously, people have tried studying Aβ in vivo using green fluorescent protein fusion together with Aβ. However, this is difficult since the aggregation of Aβ will lead to loss of fluorescence. This study aimed to crystallize the fusion protein mNG-A β1-42 and to investigate its properties as a molecular fluorescent Aβ-amyloid specific probe. Dynamic light scattering (DLS) was used to confirm that the majority of the protein was not in the form of soluble aggregates. The DLS experiments were followed by several rounds of crystallization trials. Initial screening and the subsequent narrowing down of potential conditions where mNG-Aβ1-42 could form crystals. Several staining experiments were conducted as well, including staining brain tissue from mouse with both Swedish and Arctic mutation, from human patients with sporadic AD and from human patients with AD with the Arctic mutation. The DLS experiments showed that the protein used in the crystallization experiments mostly consisted of molecular particles of the same radius. However, there was clear evidence of some larger species present that could have been a potential problem for crystallization. Crystallization experiments suggested that PEG 8000 was the most promising precipitant amongst other conditions identified for crystallization of mNG-Aβ1-42. However, the study was ultimately unsuccessful in developing crystals of sufficient high quality for diffraction studies to commence. The staining experiments demonstrated that mNG-Aβ1-42 could bind both by itself and with another amyloid probe, Congo red, and with antibodies in brain tissue from mouse with both Swedish and Arctic mutation, from human patients with sporadic AD and from human patients with AD with the Arctic mutation. In conclusion, several characteristics of mNG-Aβ1-42 were revealed in this study.

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Direne, Filho Hellinton. „MIG/MAG CCC“. reponame:Repositório Institucional da UFSC, 2014. https://repositorio.ufsc.br/xmlui/handle/123456789/129663.

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Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Engenharia Mecânica, Florianópolis, 2014.
Made available in DSpace on 2015-02-05T21:21:27Z (GMT). No. of bitstreams: 1 328837.pdf: 3599401 bytes, checksum: e5820867f869d6e549fde5af56c60012 (MD5) Previous issue date: 2014
Nas indústrias de petróleo e gás e de construção naval, a união entre componentes metálicos, caracterizada por grandes espessuras e soldagem multipasse, é, em sua maioria, executada de forma manual por soldadores previamente qualificados. Desta forma, a qualidade da solda está intimamente ligada à habilidade do soldador em adequar as condições do arco voltaico e da transferência metálica à junta que está sendo soldada. A obtenção de soldas com mínima formação de defeitos é principalmente agravada na soldagem do passe de raiz. Nesta situação é necessário um meticuloso controle da poça de fusão a fim de obter a penetração desejada, sem promover o escorrimento da poça, fenômeno conhecido como burn-through. Outro agravante está na preparação da junta a ser soldada, que nem sempre oferece dimensões repetitivas, apresentando irregularidades como gaps e ângulos variáveis, high-low, entre outras variações nas dimensões da junta. A influência destes defeitos sobre o passe de raiz é minimizada ao se garantir um maior controle da energia aportada à peça, proposição das tecnologias de controle da transferência por curto-circuito. Contudo, atualmente, a maioria do suprimento desta tecnologia advém de empresas de fontes de soldagem situadas no exterior. Além da escassez de informações sobre as várias soluções disponibilizadas por diferentes fabricantes, ainda, se está restrito a soluções para aplicações pré-definidas de fábrica. Dentro deste cenário é que se insere o presente trabalho. Ele aprimora uma tecnologia nacional, denominada de CCC (Curto-Circuito Controlado), com início de desenvolvimento em 1999. O objetivo é a criação de uma base sólida para o desenvolvimento e consolidação deste tipo de tecnologia em território nacional. Isto assegura melhor feedback com efetiva adaptação contínua. Por intermédio de implementações de software e hardware na fonte de soldagem, foi atingido um controle de alta dinâmica na forma de onda de corrente, na faixa dos microssegundos, além de melhorias nas rotinas de realimentação e controle das variáveis elétricas do processo. Cada fase da transferência metálica por curto-circuito foi avaliada em ensaios práticos de soldagem, resultando em maior precisão no controle da transferência das gotas e na dinâmica da poça de fusão. Foram desenvolvidos programas sinérgicos para os arames ER70S-6 de 1,0 e 1,2 mm de diâmetro, utilizando como gás de proteção uma composição de 75% de argônio e 25% de CO2. Procurando aumentar a facilidade de utilização do processo por parte do soldador, definiram-se apenas duas variáveis de regulagem para o processo CCC, a velocidade de alimentação de arame, entre 2 e 6 m/min, e o parâmetro ?a?, responsável por regulagens finas na potência. Os testes foram monitorados com auxílio de câmera de alta velocidade e sistemas de aquisições de dados. Com a utilização destas ferramentas de avaliação foi possível obter explicações concisas sobre a influência de cada fase da forma de onda de corrente na dinâmica da transferência metálica e da poça de fusão. Como resultado dos desenvolvimentos realizados neste trabalho, atualmente o processo de soldagem CCC apresenta alta regularidade na transferência metálica, baixa formação de respingos e adequado controle da poça de fusão, além de oferecer programas sinérgicos.

Abstract : In the oil and gas and shipbuilding industries, the welds between metal components are characterized by large thicknesses and multipass welding. This job is mostly performed manually by previously trained welders. Thus, the weld quality is closely linked to the ability of the welder to adjust the conditions of the arc and the metal transfer mode to the joint. Achieving healthy welds is particularly aggravated in the root pass welding. In this situation is necessary a meticulous control of weld pool in order to obtain the desired penetration without causing burn-through. Another problem is in the joint preparation, it does not always provide exact dimensions, presenting irregularities such as inconstant gaps and angles, high-low and other dimensions variations. The technologies that propose the controlled short circuit technology minimize the influence of these defects on the root pass with greater control of heat input. However, currently, most of the supply of this technology is in the international power sources, and the high-tech products stay in these regions and local industry just uses this technology. To create a solid foundation and develop this technology in Brazil, providing greater feedback with effective continuous adaptation, evolution and a potential success in the application of the process to the local industry, was planned out the main objective of this work, that is the improvement of the welding process CCC (Controlled short circuit), seeking to optimize its current waveform and the formulation of a synergistic program. Through software and hardware implementations and improvements in routines and feedback control of electrical process variables, the welding source is working in a high dynamic control of the current waveform, at a microsecond range. In experimental welding tests each phase of short circuit transfer was evaluated, resulting in greater precision in controlling the transfer of droplets and weld pool dynamics. Based on these results, were developed synergistic programs to mild steel consumables 1.0 to 1.2 mm in diameter, using protective gas as a composition of 75% argon and 25% CO 2. Seeking facilitate the use of the process by the welder, were set up just two variables for adjusting the CCC process, the wire feed speed, between 2 and 6 m / min, and the Â aÂ parameter responsible for fine adjustments in output power. The tests were monitored with high-speed camera and data acquisition systems. The use of these assessment tools enabled to obtain concise explanations of the influence of each phase of the current waveform and of metal transfer and weld pool dynamics. As a result this work, currently, the CCC welding process has high regularity of metal transfer, low spatter and good weld pool control, and provides synergistic programs.

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GARG, PRIYANKA. „DESIGN AND DEVELOPMENT OF METAMATERIAL BASED MICROWAVE COMPONENTS“. Thesis, DELHI TECHNOLOGICAL UNIVERSITY, 2020. http://dspace.dtu.ac.in:8080/jspui/handle/repository/18774.

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Planar technology has gained a lot of popularity since its inception due to various advantages it offered to the scientific world such as, light weight, compact size, ease of fabrication and integration, suitability of mass production and compatibility with planar solid state devices. However they also have certain drawbacks in terms of bandwidth, further miniaturization, gain, efficiency, etc. Metamataterials are introduced in the late 60s by a Russian physicist Victor Veselago [1], which were further investigated by Pendry et. al. [2] and are an active area of research these days. Metamaterials are the artificially engineered structures that offer extraordinary electromagnetic properties not found in nature such as epsilon negative media (ENG), mu negative media (MNG), double negative media (DNG), photonic band gap structures etc. They consist of multiple unit cells whose dimensions are much smaller than l0/4, where l0 is the wavelength corresponding to the highest frequency of operation, to achieve homogenization. It was discovered that these materials alter the behaviour of electromagnetic waves in an unconventional way leading to important phenomenon such as, reversal of Snells Law, Doppler effect and Vavilov-Cerenkov radiation. Due to the extraordinary behaviour of metamaterials they are used to improve the properties of various planar devices and components which are discussed earlier. They can be used to improve antenna’s gain, directivity, bandwidth and size, filter’s size, roll off, out of band rejection levels and bandwidth. They are used for multiple frequency operation. They are also being used for the development of super lenses, ultrathin perfect absorbers, cloaks, high sensitivity and high resolution sensors, phase compensator etc. The main focus of this thesis is on metamaterial based antennas, filters and absorbers. Chapter 3 presents the design of a compact, low-profile, coplanar waveguide (CPW)-fed metamaterial inspired dual band microstrip antenna for WLAN application. To achieve the goal a triangular split ring resonator (TSRR) is used along with an open ended stub. The proposed antenna has a compact size of 20×24 mm2 fabricated on an FR-4 epoxy substrate with dielectric constant (er=4.4). The antenna provides two distinct bands I from 2.40-2.48 GHz and II from 4.7-6.04 GHz with reflection coefficient better than -10 dB, covering the entire WLAN (2.4/5.2/5.8 GHz) band spectrum. The performance of this metamaterial inspired antenna is also studied in terms of the radiation pattern, efficiency, and realized gain. The antenna is practically fabricated and tested to show good agreement with the simulated results. Chapter 4 is divided into four sections. The first section presents a compact, low-profile Band Stop Filter (BSF) designed using Complimentary Split Ring Resonator (CSRR). An equivalent circuit model is also presented along with the simplified mathematical approach to extract the parameters of the circuit model. This paper also presents the effect of variation in the dimensions of split rings on characteristics of BSF. The proposed BSF has a compact size of 27×20 mm2 designed on FR-4 substrate with dielectric constant (er)=4.3. The filter provides complete suppression of the band at 2.4 GHz. The design and circuit analysis of this metamaterial based filter is presented in terms of reflection coefficient, transmission coefficient and impedance curve. The second section presents the design and analysis of a metamaterial inspired Bandstop Filter (BSF) providing suppression of frequency at 3 GHz. The overall size of proposed BSF is 20mm×20mm×1.6mm. Further,the extraction of lumped parameters of the designed BSF using simulated results is presented and validation of the results using equivalent circuit simulation is also presented. The third section presents a comparison based study of microstrip transmission line based bandstop filters taking different complementary resonators on the ground plane. Six metamaterial resonators unit cells have been investigated from the literature. The dimensions are optimized to operate at 3 GHz and then their comparative analysis is performed based on various properties of filters such as insertion loss, 3 dB v bandwidth, quality factor (Q), shape factor, overall size, unit cell size and group delay. There are a number of metamaterial based resonators available in literature, so the objective of this section of the chapter is to provide a comparative analysis so that the user can point out the best configuration required while designing the bandstop filter that suits the desired specification and also helps in developing the future ideas by taking into account the advantages of the available structures. The forth section presents a compact, low-profile, Band Pass Filter (BPF) based on balanced Dual Composite Right/Left Handed (D-CRLH) Transmission Line (TL) is presented in this chapter. A balanced D-CRLH TL can be used to provide wideband filter characteristics due to no frequency separation between the RH and LH frequency bands. The proposed D-CRLH TL is designed using U-shaped complementary split ring resonator (UCSRR). The extraction of equivalent circuit model of proposed UCSRR unit cell is also performed. Further, the bandwidth of the proposed filter is enhanced by using the concept of electric and magnetic coupling between the slot lines. The proposed via less BPF has a compact size of 15×15 mm2 designed on an FR-4 substrate with dielectric constant(er)=4.3. The design analysis of proposed bandpass filter is presented in terms of reflection coefficient, transmission coefficient, impedance curve, propagation constant and group delay. Chapter 5 presents a novel resonant metamaterial absorber exhibiting five resonant peaks with absorptivity more than 90% in the range from S band to Ku band for radar cross-section reduction and other FCC-airborne applications. The structure is designed on a low cost FR-4 substrate with 1 mm thickness which is equivalent to l /17.75 where l is the wavelength corresponding to maximum resonant frequency of absorption, showing its ultrathin nature. The fourfold symmetry of the design results in polarization insensitivity and provides an angular stability up to 60◦ of incident angle. The multiband characteristics are obtained by combining three different geometries in a single structure. Performance of the absorber is studied in terms of absorptivity, material parameters, normalized impedance, polarization insensitivity and oblique incidence. Finally, the design is fabricated on a 200×200mm2 FR-4 substrate and measurements are performed. Further, the chapter also presents a closed meander line shaped vi metamaterial absorber operating at 3.5 GHz WiMAX band. The proposed metamaterial absorber unit cell has a compact size of 0.11l0×0.11l0 design on an ultrathin FR-4 substrate with thickness 0.018l0, where l0 is the wavelength corresponding to operating frequency. The proposed absorber shows an absorptivity of 98.5 % at the intended frequency. The design is evolved from a simple square loop to a symmetrical meander line structure whose dimensions are optimized to operate at 3.5 GHz WiMAX band. An equivalent circuit model is also defined to depict the electrical properties of the structure. The proposed design also shows insensitivity to polarization as well as change in incident angle of the wave over a wide-angle (upto 60◦) for both TE and TM polarization. The proposed structure is a good candidate for radar cross section reduction of an antenna. Chapter 6 demonstrates the use of metamaterial absorber (MA) to achieve high isolation between two patch antennas in a 2-element MIMO system operating at 5.5 GHz resonant frequency useful for WiMAX application. The proposed flower shaped MA, designed on a 9×9mm2 FR-4 substrate with 1 mm thickness, exhibits near unity normalized impedance at 5.5 GHz with an absorptivity of 98.7 %. A 4 element array of the MA is arranged in the form of a line in the middle of the two radiating patches in order to suppress the propagation of surface current between them at the operating frequency. Using the proposed flower shaped MA, an isolation of nearly 35 dB is achieved. The MIMO structure is studied in terms of return loss, isolation, overall gain, radiation pattern, Envelope Correlation Coefficient (ECC), Diversity Gain (DG), and Total Active Reflection Co-efficient (TARC) etc. The structure is finally fabricated and measured to show good agreement with the simulated results.

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Zelenitca, Darina. „Design MIG/MAG svářečky“. Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-416428.

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The topic of this diploma thesis is the design of a MIG/MAG welding machine, suitable for locksmiths and workshops. The diploma thesis includes the analysis of existing products from the design and technical point of view and deals with the design of welding machine. The proposed concept focuses on interactive and modern look of the machine and comfortable manipulation and easy operation. The design itself offers a possible direction of morphology of welding machines in the future.

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Gonzalez, Arnaldo Ruben. „Efeito da forma da onda sobre as características de fusão na soldagem MIG/MAG com corrente pulsada“. reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 1997. http://hdl.handle.net/10183/170223.

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Neste trabalho foram analisados alguns efeitos da forma e freqüência da onda de tensão de controle sobre as características de saída da fonte de soldagem MIG/MAG pulsada, ou seja, corrente de soldagem, tensão do processo e potência do sistema. Até o presente muito pouco foi realizado no sentido de se estudar, caracterizar e quantificar os possíveis efeitos da forma de onda de saída da fonte de soldagem sobre as características de fusão. Portanto, realizou-se um enfoque teórico/prático das variáveis elétricas do processo analisando-se diversas formas de onda de saída da fonte sobre as características de fusão. Utilizando uma fonte do tipo MIG/MAG pulsada com diversas formas de ondas periódicas, foram feitas soldas de simples deposição sobre a superfície e tipo filete em chapas de aço baixo carbono, posição plana eletrodo positivo. Como metal de adição foi usado o arame AWS ER70S-6, e como gás de proteção uma mistura com 96 % de Ar e 4 % de CO2. Foram propostas fórmulas teóricas e verificadas experimentalmente, a partir de conceitos de eletricidade, para a determinação da potência média do sistema, energia média de soldagem, taxa média de fusão do arame e outras, e discutidas amplamente em função dos resultados experimentais, para o processo MIG/MAG pulsado e qualquer forma de onda inclusive aquelas analisadas neste trabalho. Também foram deduzidas fórmulas para determinar as eficiências de fusão do consumível, metal base e processo em função da energia média de soldagem. Neste trabalho, foi definida a eficiência de fusão do arame como a relação entre a energia utilizada para fundir e destacar um volume de arame por período da onda e a fornecida por período da onda pela fonte de soldagem. A eficiência de fusão do arame foi amplamente discutida com relação às diferentes formas de onda de saída da fonte de soldagem, em um largo espectro de parâmetros da onda. Foi proposta uma nova relação entre a taxa média de fusão do arame e a potência média do sistema, levando-se em consideração os termos relativos ao aquecimento causado pela potência do arco elétrico e efeito Joule. A eficiência de fusão do consumível, utilizada nesse trabalho, depende do produto das eficiências de deposição e de fusão do arame e, portanto, é uma função da energia média de soldagem, propriedades fís icas do arame e seção transversal do metal de adição. As eficiências de fusão do consumível, metal base e processo foram discutidas levandose em consideração as diferentes formas de onda de saída da fonte de soldagem utilizadas neste trabalho. Foi estabelecida uma relação entre as eficiências fusão acima citadas e as variáveis principais de controle do processo MIG/MAG pulsado.
Some effects of reference control voltage waveform and frequency (input signal) on pulsed GMA W power output characteristics, i.e., welding current, process voltage, and power system have been analyzed in this work. Until now, not much has been realized on studying, characterizing and quantifying the waveform power output feasible effects on fusion characteristics. Therefore, a theoreticaVpractical aim of the process electrical variables has been reaüzed, analyzing several power output waveforrns on fusion characteristics. Using a GMA W power source with several periodic waveforms, flat position bead-onplate and fillet welds were deposited on low carbon steel with wire positive polarity current. Both AWS ER70S-6 filler wire and 96% Ar + 4% CO2 shielding gas were used on these welds. Theoretical formulas have been proposed and the their validity were experimentally tested from electricity concepts to determine average power system, heat input, wire melting rate, etc., and largely discussed using experimental results, for pulsed GMA W power, and any output wavefoms including those analyzed herein. Also, formulas have been deduced to determine the consumable, base metal, and process melting efficiencies as function of average heat input. Wire melting efficiency has been defmed herein as the ratio between the necessary energy to melt and detach a wire volume within a wave period and the released energy from the power source within the same wave period. Wire melting efficiency has been largely discussed related to the different power output waveforms, in a wide wave parameters spectrum. It has been purposed a new relationship between average wire melting rate and average power system, taking are power heating and Joule effects terms into account. Consumable melting efficiency, defmed herein, depends on the product of deposition and wire melting efficiencies, and therefore, is a function of average heat input, wire physical propenies, and weld reinforcement transversal cross-section area. Consumable, base metal, and process melting efficiencies have been extensively discussed, taking into account the different power output waveforms used herein. Also, it was established a relationship between the above quoted melting efficiencies and the controUed pulsed GMA W process principal variables.

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Almeida, Daniel Soares de. „Soldagem subaquatica com mig/mag“. reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 1992. http://hdl.handle.net/10183/130091.

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Na produção de soldas subaquáticas são empregadas várias técnicas que podem ser classificadas em dois grandes grupos: Técnicas de soldagem em câmaras secas e Técnicas molhadas. Ambos os grupos apresentam inconvenientes: os primeiros são capazes de produzir soldas de alta qualidade, no entanto, estas soldas são de custo muito elevado. As técnicas de soldagem molhada são de custos mais reduzidos e mais versáteis. Porém, a qualidade é muito baixa e seu emprego, normalmente, se restringe à reparos. Uma solução para estes problemas é o processo MIG/MAG com cavidade local seca. Com este processo pode-se produzir soldas de qualidade superior com baixos custos. O objetivo deste trabalho foi projetar e construir um dispositivo (bocal) que permitisse a criação de uma região seca em torno do arco e poça de fusão. Com este dispositivo passou-se à investigar os parâmetros de soldagem que permitissem a obtenÇão de cordões de solda na água. Análises do aspecto, geometria e dureza destes cordões foram realizadas e comparadas com outros feitos na superficie. Juntas de topo na posição plana com chanfro em "V" simples de 60° foram realizadas à uma profundidade de 300mm em chapas de aço BS4360 e arame AWS ER70S-6.
To make underwater welds, many kinds of techniques have been proposed and used, which may be classified in two large groups: Dry Chamber Techniques and Wet Techniques. Both groups show inconveniences: Dry Chamber Techniques are able to produce high quality welds, but they are costly. Wet Welding Techniques are less expensive and more versatile; however, the welds are rather poor and their uses are generally limited to repairs. So, perhaps wet underwater GMAW with local cavity is a solution for this problem. With this process, it is possible to produce welds with high quality and low cost. Therefore, the main aim o f this work was to develop a nozzle, that allows the formation of a stable and durable dry cavity around the are and molten weld pool. Also, it was investigated the welding parameters, in a way to have sound underwater bead-on-plate and flat position groove ·welds. Analysis of geometry, hardness and mechanical properties of those welds were made, and compared with another made on land. Flat position welds.were made at a depth of 300mm on BS 4360 steel plates, single-V, 60° angle, with filler wire AWS ER70S-6.

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NEVES, FILHO Sergio Alvares da Costa. „Implantação de reengenharia no processo de soldagem em uma empresa da região nordeste“. Universidade Federal de Pernambuco, 2007. https://repositorio.ufpe.br/handle/123456789/5503.

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Made available in DSpace on 2014-06-12T17:39:55Z (GMT). No. of bitstreams: 2 arquivo7545_1.pdf: 8111574 bytes, checksum: 1accaf92324c61d9ccd606c3025617da (MD5) license.txt: 1748 bytes, checksum: 8a4605be74aa9ea9d79846c1fba20a33 (MD5) Previous issue date: 2007
Devido à expansão do projeto SUAPE, com a chegada a Pernambuco de empresas de grande porte como a refinaria e o estaleiro, há a necessidade de contratação de muitos fornecedores e prestadores de serviços. Existe, portanto a expectativa de que sejam implantadas mais de 200 empresas na região até 2010 que conseqüentemente acarretará numa movimentação econômica e financeira do estado, sobretudo para empresas ligadas à engenharia. Este trabalho apresenta uma metodologia elaborada para implantar a reengenharia nos processos de soldagem de uma empresa da região, visando uma redução de custo e uma maximização da produção com melhor qualidade na fabricação dos cilindros de aço de baixa pressão. Para se conseguir estas melhorias foi necessário: escolher os processos a serem reformulados; escolher o grupo que executará os trabalhos de reeengenharia; compreender os processos na forma que estavam sendo executados; estabelecer como devem ser estes processos no futuro; determinar as medidas necessárias para reformula-los e executar o plano para por em prática as modificações desejadas

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Corsi, Marie-Constance. „Magnétomètres à pompage optique à Hélium 4 : développement et preuve de concept en magnétocardiographie et en magnétoencéphalographie“. Thesis, Université Grenoble Alpes (ComUE), 2015. http://www.theses.fr/2015GREAT082/document.

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La magnétocardiographie (MCG) et la magnétoencéphalographie (MEG) sont deux techniques d'imagerie non-invasives mesurant respectivement les champs magnétiques cardiaques et cérébraux. Les dispositifs actuels utilisent des capteurs supraconducteurs de haute performance mais nécessitant un dispositif de refroidissement cryogénique, engendrant de fortes contraintes tant techniques que financières. Les magnétomètres à pompage optique (OPM) tendent à constituer une réelle alternative. Parmi eux figurent ceux développés au CEA-LETI, basés sur l'utilisation de l'hélium 4. Cette thèse a pour objectif de développer des magnétomètres vectoriels à 4He (fonctionnant à température ambiante) dédiés aux applications MCG et MEG.Après une optimisation des paramètres-clés d'un prototype non-miniaturisé préexistant, une sensibilité inférieure à 100 fT/sqrt(Hz) a pu être obtenue suivant deux axes. Afin de respecter les besoins spécifiques de la MCG et de la MEG une étape de miniaturisation a dû être menée et une architecture gradient-métrique a été mise en place. Parallèlement, des tests précliniques menés à Clinatec nous ont permis de concevoir un nouveau conditionnement du prototype, ainsi qu'un système réduisant les perturbations magnétiques. Une analyse des principales sources de bruit a révélé que les deux principaux contributeurs au bruit sont le laser et le système de décharge HF. Nous avons ainsi envisagé plusieurs pistes d'amélioration du niveau de bruit dont une nouvelle technique de détection. Le prototype issu de ces travaux comporte une pièce élémentaire (la cellule) d'un centimètre de côté, et présente une sensibilité intrinsèque de 350 fT/sqrt(Hz).Le dispositif a ensuite été testé avec succès dans le cadre de mesures MCG sur un sujet sain, précédées de tests sur fantôme ayant permis de prouver l'opérabilité de nos capteurs dans un environnement clinique. Par ailleurs, la reproductibilité des résultats ainsi que la possibilité de réduire à 30 s le temps d'acquisition des données ont pu être démontrées. Une optimisation spécifique de la partie optique du prototype a permis d'obtenir une sensibilité de l'ordre de 210 fT/sqrt(Hz) entre 3 et 300 Hz, compatible avec l'application MEG. Après des tests menés avec succès sur fantôme, trois séries d'essais ont été réalisées sur un sujet sain. Nous avons pu ainsi détecter des potentiels évoqués auditifs, visuels ainsi qu'une modulation de l'activité cérébrale spontanée sous l'effet de l'ouverture des paupières. L'ensemble des résultats obtenus constitue les premières preuves de concept cliniques du dispositif en MCG et MEG
Magnetocardiography (MCG) and magnetoencephalography (MEG) are non-invasive techniques consisting in measuring respectively cardiac and brain magnetic fields. Despite their performance, the sensors currently used need a cryogenic cooling system which engenders technical and financial constraints. New cryogenic-free sensors have recently emerged: the OPMs (Optically-Pumped Magnetometers). Among them, vector 4He magnetometers developed by CEA-LETI which work at room-temperature. This thesis is focused on the development of 4He magnetometers dedicated to MCG and MEG.After having optimized the key-parameters of a first non-miniaturized prototype, a sensitivity inferior to 100 fT/sqrt(Hz) has been obtained along two axes. In order to meet biomedical constraints, a miniaturization of the device has been processed. In parallel, preclinical tests were carried out which have enabled us to design a gradiometer mode, a new packaging, and a magnetically isolated system. A noise analysis revealed that laser and HF discharge were the main sources of disturbance, and lead us to consider improvements such as a new detection mode. Eventually, a sensor, with a 1cm-sided cell, and an intrinsic sensitivity of 350 fT/√Hz has been developed.Then, device has been successfully tested in the frame of the MCG application from a healthy subject, preceded by a simulation study with a phantom which enables us to demonstrate its operability within a clinical environment. Moreover, we have proved the reproducibility of the measurements and the possibility to detect the main features of the cardiac cycle within a 30 s recording time. A specific optimization of the optical part has enabled us to obtain a 210 fT/sqrt(Hz) sensitivity between 3 and 300 Hz, suitable for the MEG application. After having tested our device with a phantom, three MEG experiments were performed with a healthy subject: auditory evoked field, visual evoked field and spontaneous activities have been detected. The obtained results form the first clinical proof of concept of the device for MCG and MEG applications

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Zielinska, Sylwia. „Propriétés physiques du plasma MIG-MAG“. Phd thesis, Université d'Orléans, 2005. http://tel.archives-ouvertes.fr/tel-00458799.

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Les plasmas de type MIG-MAG n'étaient pas, jusqu'à présent, examinés en détail et exploités en laboratoire. En raison des applications techniques de ce type d'arc électrique, la plupart des expériences et des calculs théoriques se limitaient à l'étude des processus provenant des régions des électrodes. Des l'année 1948, au cours de laquelle les premiers brevets ont été déposés pour des arcs sous argon, les procédés de soudage MIG-MAG ont été exploités avec succès comme une des plus populaires méthodes d'assemblage de métaux. Et pourtant, malgré plus de cinquante ans d'histoire et de développement de cette méthode, la plupart des phénomènes fondamentaux qui y prennent naissance, n'ont pas trouvé d'explications. En 1953 Lubawski et Nowosilow ont présenté, pour la première fois, un arc avec une électrode fusible fonctionnant sous protection de dioxyde de carbone. On peut admettre, que à partir de ce moment, on a cherché à savoir de quelle manière le type du gaz appliqué influait sur le transfert du métal dans l'arc. En particulier, il s'agissait de déterminer comment des différences de propriétés physiques du plasma pouvaient intervenir sur les procédés intervenants dans la région de l'électrode supérieure, et pourquoi dans les mélanges gazeux riches en dioxyde de carbone on ne pouvait pas obtenir un régime de fonctionnement d'arc de type pulvérisation axiale ? Malheureusement, toutes les tentatives pour répondre à ces questions, par exemple un postulat selon lequel une modification de la distribution du courant dans l'extrémité d'électrode provoquerait une constriction de l'arc et une inversion de la force de Lorentz [83], restent toujours et uniquement seulement des hypothèses. Les travaux présentés dans cette thèse avaient pour but de comprendre l'influence du gaz utilisé sur le transfert du métal dans l'arc, et plus spécifiquement pourquoi une augmentation de la proportion de dioxyde de carbone dans le mélange gazeux provoquait un changement de son régime de fonctionnement. Les mesures réalisées ont toutes été financées par Air Liquide Welding, dans le but d'améliorer le procédé. Un motif supplémentaire de mener des recherches sur l'arc MIG-MAG, est la quasi-absence de données expérimentales concernant les distributions de température et de densité électronique dans ce type de plasma. Les données disponibles dans la littérature sont généralement le fruit de simulation numériques sans réelle validation expérimentale. Ainsi, par exemple, les valeurs de température présentées par Haidar semblent trop élevées pour un plasma dominé par les vapeurs métalliques. Le caractère particulier de l'arc de soudage, dont le spectre d'émission consiste en de nombreuses raies spectrales fortement élargies par effet Stark, a également permis de mesurer, parfois pour la première fois, les paramètres Stark des raies d'éléments métalliques. Une telle possibilité est très intéressante, car pour déterminer les élargissement et déplacement Stark de raies métalliques, il est nécessaire d'introduire les vapeurs de ce métal dans la région de décharge. En général, dans le cas des plasmas utilisés en laboratoire, cela n'est pas simple et induit de gros problèmes de demixing difficiles à résoudre, comme le montre la relativement faible quantité de données expérimentales disponibles jusqu'à présent. Ce sont pourtant des données essentielles pour la connaissance des milieux plasmagènes, notamment ceux étudiés en astrophysique.

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Zhongguo Jinggangshan gan bu xue yuan. Jiao cai bian shen wei yuan hui., Hrsg. Jinggangshan ge mng gen ju di jian shi: Jinggangshan geming genjudi jianshi. Beijing: Dang jian du wu chu ban she, 2007.

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Nicholas, Bamforth, und Leyland, Peter, lecturer in law., Hrsg. Public law in a multi-layered constitution. Oxford: Hart, 2003.

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Catherine, Barnard, und Scott Joanne, Hrsg. The law of the single European market: Unpacking the premises. Oxford: Hart Pub., 2002.

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1968-, Albertazzi Daniele, Hrsg. Resisting the tide: Cultures of opposition under Berlusconi (2001-06). New York, USA: Continuum International Pub. Group, 2009.

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Inc, ebrary, Hrsg. Yorkist lord: John Howard, Duke of Norfolk, c.1425-1485. London: Continuum, 2010.

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Maggie, Charles, Pecorari Diane und Hunston Susan 1953-, Hrsg. Academic writing: At the interface of corpus and discourse. London: Continuum, 2009.

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Yikezhao meng di ming wei yuan hui. Yikezhao meng di ming zhi. [Place of publication not identified]: [publisher not identified], 1986.

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kun, Yan fei. Sheng ming de meng ya. Bei jing: Zhong guo fang zhi chu ban she, 2000.

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zZonglei, Cui. Lun yu: Meng zi. Ha er bin: Ha er bin chu ban she, 2011.

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Agarwal, Amit, Ranil Fernando, Rajeev Parameswaran, Anand Mishra und Roma Pradhan. „Toxic MNG“. In Case Studies in Thyroid and Parathyroid Tumors, 249–51. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-0938-4_57.

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Panic, Katarina, Verolien Cauberghe und Patrick De Pelsmacker. „Promoting Dental Care to Children Using Traditional and Interactive Mng Tedia Followihreat Appeals“. In Advances in Advertising Research (Vol. III), 331–40. Wiesbaden: Gabler Verlag, 2012. http://dx.doi.org/10.1007/978-3-8349-4291-3_25.

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Livesey, Andrew, und Alan Robinson. „Gas shielded arc welding (MIG, MAG and TIG)“. In The Repair of Vehicle Bodies, 229–62. 7th edition. | Boca Raton : Routledge, 2018. | Earlier editions by Alan Robinson.: Routledge, 2018. http://dx.doi.org/10.1201/9781351230650-12.

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Esch, Lorenz, Christoph Dinh, Eric Larson, Denis Engemann, Mainak Jas, Sheraz Khan, Alexandre Gramfort und Matti S. Hämäläinen. „MNE: Software for Acquiring, Processing,and Visualizing MEG/EEG Data“. In Magnetoencephalography, 1–17. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-319-62657-4_59-1.

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Esch, Lorenz, Christoph Dinh, Eric Larson, Denis Engemann, Mainak Jas, Sheraz Khan, Alexandre Gramfort und M. S. Hämäläinen. „MNE: Software for Acquiring, Processing, and Visualizing MEG/EEG Data“. In Magnetoencephalography, 355–71. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-00087-5_59.

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Ilmoniemi, R. J., A. Ahonen, K. Alho, H. J. Aronen, J. Huttunen, J. Karhu, P. Karp et al. „MEG and MCG in a Clinical Environment: BioMag Laboratory, Helsinki“. In Biomag 96, 1014–17. New York, NY: Springer New York, 2000. http://dx.doi.org/10.1007/978-1-4612-1260-7_246.

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Pardasani, R. T., und P. Pardasani. „Effective magnetic moment of Mn3[Mn2(NO)2(CN)10]“. In Magnetic Properties of Paramagnetic Compounds, 1272. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-23675-4_1155.

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Webster, Steve, Matt Rice, Kev Sutherland, Jacob Hanson, James Palmer, Todd Marks und Håvard Eide. „Ming“. In Advanced PHP for Flash, 212–53. Berkeley, CA: Apress, 2002. http://dx.doi.org/10.1007/978-1-4302-5205-4_8.

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Ducheneaux, Candace. „Mni“. In Emergent Possibilities for Global Sustainability, 258–60. Abingdon, Oxon ; New York, NY : Routledge, 2016. Identifiers: LCCN 2016001739| ISBN 9781138830059 (hb) | ISBN 9781315737478 (ebook): Routledge, 2016. http://dx.doi.org/10.4324/9781315737478-39.

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Konferenzberichte zum Thema "MNG"

Vivek, A., K. Shambavi und Zachariah C. Alex. „Simulation study of MNG based metamaterial structures“. In 2017 International Conference on Computer Communication and Informatics (ICCCI). IEEE, 2017. http://dx.doi.org/10.1109/iccci.2017.8117780.

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Chen, Shih-Yuan, Raoul O. Ouedraogo, Andrew Temme, Alejandro R. Diaz und Edward J. Rothwell. „MNG-metamaterial-based efficient small loop antenna“. In 2009 IEEE Antennas and Propagation Society International Symposium (APSURSI). IEEE, 2009. http://dx.doi.org/10.1109/aps.2009.5172037.

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Chasman, Daniel, Stephen Haight und Richard Loehr. „Viscous losses of MNG in Hybrid Motor Tests“. In 48th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2012. http://dx.doi.org/10.2514/6.2012-4266.

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Klimov, A. V. „Reflective polarizer based on anisotropic layer of ENG+MNG metamaterial“. In 2017 Radiation and Scattering of Electromagnetic Waves (RSEMW). IEEE, 2017. http://dx.doi.org/10.1109/rsemw.2017.8103629.

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Joong-Kwan Kim, Yong-Jin Kim und Hong-min Lee. „Electrically small loop antenna using the MNG ground plane structure“. In 2008 IEEE Antennas and Propagation Society International Symposium and USNC/URSI National Radio Science Meeting. IEEE, 2008. http://dx.doi.org/10.1109/aps.2008.4619326.

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Liao, Shumin, Hui Lin, Heng Guo, Yixiang Song und Wei Liu. „A Wideband MNG- TL Planar Microstrip Antenna for WLAN Applications“. In 2022 IEEE 22nd International Conference on Communication Technology (ICCT). IEEE, 2022. http://dx.doi.org/10.1109/icct56141.2022.10072621.

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Chasman, Daniel, Stephen Haight und Andrew Facciano. „Excessive Nozzle Erosion in a Multi-Nozzle Grid (MNG) Test“. In 41st AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2005. http://dx.doi.org/10.2514/6.2005-4495.

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Khaleel, H. R., H. M. Al-Rizzo, D. G. Rucker, Y. A. Rahmatallah und S. Mohan. „Mutual coupling reduction of dual-band printed monopoles using MNG metamaterial“. In 2011 IEEE Antennas and Propagation Society International Symposium and USNC/URSI National Radio Science Meeting. IEEE, 2011. http://dx.doi.org/10.1109/aps.2011.5996956.

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Liu, Hu, Ying Liu und Shuxi Gong. „An MNG-TL loop antenna for UHF near-field RFID applications“. In 2014 3rd Asia-Pacific Conference on Antennas and Propagation. IEEE, 2014. http://dx.doi.org/10.1109/apcap.2014.6992530.

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Zhang, Liwei, Yewen Zhang und Youzhen wang. „Transmission Properties of ENG-MNG Structure Based On CRLH Transmission Line“. In >2006 Joint 31st International Conference on Infrared Millimeter Waves and 14th International Conference on Teraherz Electronics. IEEE, 2006. http://dx.doi.org/10.1109/icimw.2006.368471.

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Berichte der Organisationen zum Thema "MNG"

Csiffáry, Gabriella. 1828. június 1-jén nyílt meg az első magyar kisdedóvó. Budapest Főváros Levéltára, 2021. http://dx.doi.org/10.56045/blm.2021.15.

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1828-ban nyitotta meg kapuit az első magyar kisdedóvó intézet a Krisztinavárosban. Mi késztette az alapítót óvoda létrehozására kevésbé tehetős családok gyermekei számára? A másfél évestől hét esztendős kisgyermekeket foglalkoztató intézmények történetét, ahol a játék mellett oktatták is a lányokat, fiúkat és az alapító, Brunszvik Teréz nem könnyű sorsát idézi fel a cikk, hiszen Brunszvik később kiszorult az általa indított óvodai mozgalomból. A siker bizonyítéka, hogy még életében több mint 80 óvoda jött létre.

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Salát, Gergely. A kínai gazdaság középtávú kilátásai. Magyar Külügyi Intézet, 2023. http://dx.doi.org/10.47683/kkielemzesek.ke-2023.47.

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A 2023-as évben a kínai gazdaság vegyes eredményeket produkált, s ennek megfelelően az elemzők két véglet között mozognak a kínai gazdaság jövőjével kapcsolatban. Az egyik véglet szerint Kína folytatja gyors növekedését, s hamarosan megelőzi az Egyesült Államokat, míg a másik szélsőséges vélemény szerint Kína sérülékeny, és bármelyik pillanatban összeomolhat. Az értékeléseket a propagandaszempontok is befolyásolják, ami még nehezebbé teszi a tisztánlátást. A jelen elemzés azt vizsgálja, hogy a kínai gazdaság milyen tartalékokkal rendelkezik, milyen növekedési tényezők és lehetőségek állnak még rendelkezésére, és ezek milyen hatással vannak az ország középtávú kilátásaira. Az extenzív és intenzív növekedési tényezők, a jelentős kormányzati mozgástér, a társadalom tűrőképessége és rugalmassága, az innováció központi szerepe és a kínai gazdaság sajátosságai abba az irányba mutatnak, hogy az elkövetkező évtizedben Kína tovább növekedhet, ugyanakkor a bővülés üteme tovább lassulhat.

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Vetrano, J. S., C. A. Lavender, M. T. Smith und S. M. Bruemmer. Effect of precipitate structure on hot deformation of Al-Mg-Mn alloys. Office of Scientific and Technical Information (OSTI), Oktober 1993. http://dx.doi.org/10.2172/10110243.

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Soltész, Béla. A 2022-es brazíliai elnökválasztás tanulságai és perspektívái. Külügyi és Külgazdasági Intézet, 2022. http://dx.doi.org/10.47683/kkielemzesek.ke-2022.57.

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A 2022 októberében rendezett brazíliai elnökválasztást szoros versenyben a baloldali Lula da Silva nyerte, aki 2003 és 2010 között már két cikluson át a legnagyobb dél-amerikai ország elnöke volt. Az újraválasztásért induló jobboldali Jair Bolsonaro elnök a vártnál jobban szerepelt, de a második fordulóban 1,8 százalékkal Lula mögött végzett. A kampány személyeskedő, durva hangvételű volt, amelyben a jelöltek az ellenfelük lejáratására törekedtek. A brazil társadalmat erősen polarizálta a két antagonisztikus jelölt összecsapása. Lulára az északi és északkeleti régiók lakói, a szegényebbek, a színesbőrűek és a nők szavaztak az átlagnál magasabb számban, míg Bolsonarót az átlagnál magasabb arányban támogatták Dél-, Délkelet- és Közép-Brazília lakói, a jómódúbbak, a fehérbőrűek és a férfiak. A területi eloszlás a képviselőházi, szenátusi és kormányzóválasztási eredményeket illetően is hasonló volt. Bár korábban tett rá utalásokat, hogy nem fogja elfogadni az eredményt, Bolsonaro végül nem akadályozta meg a hatalomátadás megkezdését. Lula helyzete ennek ellenére nehéz: míg első két elnöki ciklusa során a világgazdasági konjunktúra komoly fejlődési lehetőséget biztosított Brazíliának, a jelenlegi kedvezőtlen trendek beszűkítik a lehetőségeit. A Bolsonaróval szimpatizáló parlamenti képviselők relatív többsége szintén akadályozó tényező lehet. A környezetvédelemben előrelépés valószínűsíthető, az amazóniai erdőirtás lassulhat. Külpolitikai téren a latin-amerikai integráció és az Európához fűződő kapcsolatok terén fejlődés várható, míg az orosz–ukrán háború és az amerikai–kínai rivalizálás kapcsán Brazília megtarthatja eddigi semleges, távolságtartó pozícióját.

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Kim, Young, und Igor Savukov. Breakthrough MEG Technology. Office of Scientific and Technical Information (OSTI), August 2021. http://dx.doi.org/10.2172/1813819.

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Henriksen, P. W., S. Hurdle und J. F. Hafer. MAWST file generator (MFG). Office of Scientific and Technical Information (OSTI), Dezember 1993. http://dx.doi.org/10.2172/10107545.

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Mezei, Tibor. A dél-kínai-tengeri vita az amerikai-kínai rivalizálás kontextusában. Magyar Külügyi Intézet, 2023. http://dx.doi.org/10.47683/kkielemzesek.ke-2023.50.

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A 2010-es évek eleje óta ismét az ázsiai és csendes-óceáni térség külpolitikai napirendjére került a Dél-kínai-tengerhez kapcsolódó területi vita. A Kínai Népköztársaság a tenger túlnyomó részére ki kívánja terjeszteni szuverenitását, és ezzel az igénnyel szemben fogalmazta meg területi követeléseit Vietnám, Malajzia, Brunei Szultanátus és a Fülöp szigetek. Bár a hágai Állandó Választottbíróság 2016-ban hozott ítélete nem hozott megoldást, a vitázó feleket a tárgyalások újrakezdésére késztette. A tárgyalások azonban eddig még nem vezettek kézzelfogható eredményre, és ez előidézheti komolyabb súrlódások kialakulását közöttük. A helyzetet bonyolította az utóbbi években felerősödő stratégiai verseny Kína és az Egyesült Államok között. A vitában érintett délkelet-ázsiai államokat szoros gazdasági és kereskedelmi szálak fűzik Kínához, Amerika viszont arra törekszik, hogy a Dél-kínai-tenger kérdése miatti ellentéteket kihasználva gátat szabjon a kínai befolyás további növekedésének a térségben.

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Hoppe, Thomas, Deborah Schanz, Adrian Schipp, Felix Siegel, Susann Sturm und Caren Sureth-Sloane. Global MNC Tax Complexity Survey. TRR 266 Accounting for Transparency, 2020. http://dx.doi.org/10.52569/rpvo1003.

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Seite, P., A. Yegin und S. Gundavelli. Mobile Access Gateway (MAG) Multipath Options. RFC Editor, Januar 2018. http://dx.doi.org/10.17487/rfc8278.

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Harst, Simon, Deborah Schanz, Felix Siegel und Caren Sureth-Sloane. 2020 Global MNC Tax Complexity Survey. TRR 266 Accounting for Transparency, Juni 2021. http://dx.doi.org/10.52569/jtln9499.

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