The Heisenberg Group: A Different Point of View

2001 ◽  
pp. 175-201
Author(s):  
Karlheinz Gröchenig
Keyword(s):  
Heisenberg Group ◽  
Point Of View ◽  
Group A

DESITTER GAUGE THEORY OF GRAVITATION

2003 ◽  
Vol 14 (01) ◽  
pp. 41-48 ◽  
Author(s):  
G. ZET ◽  
V. MANTA ◽  
S. BABETI
Keyword(s):  
Gauge Theory ◽  
Riemann Tensor ◽  
Space Time ◽  
Point Of View ◽  
Field Equations ◽  
Minkowski Space Time ◽  
Strength Tensor ◽  
Group A ◽  
Theory Of Gravitation ◽  
Tensor Formula

A deSitter gauge theory of gravitation over a spherical symmetric Minkowski space–time is developed. The "passive" point of view is adapted, i.e., the space–time coordinates are not affected by group transformations; only the fields change under the action of the symmetry group. A particular ansatz for the gauge fields is chosen and the components of the strength tensor are computed. An analytical solution of Schwarzschild–deSitter type is obtained in the case of null torsion. It is concluded that the deSitter group can be considered as a "passive" gauge symmetry for gravitation. Because of their complexity, all the calculations, inclusive of the integration of the field equations, are performed using an analytical program conceived in GRTensorII for MapleV. The program allows one to compute (without using a metric) the strength tensor [Formula: see text], Riemann tensor [Formula: see text], Ricci tensor [Formula: see text], curvature scalar [Formula: see text], field equations, and the integration of these equations.

scholarly journals Efficacy and safety of formoterol versus montelukast as add on therapy in moderate persistent asthma

2017 ◽  
Vol 6 (6) ◽  
pp. 1420
Author(s):  
Mamta Rani ◽  
Jarnail Singh ◽  
Prem Parkash Gupta
Keyword(s):  
Therapeutic Option ◽  
Symptom Control ◽  
Persistent Asthma ◽  
Point Of View ◽  
P Value ◽  
Night Time ◽  
Group A ◽  
Group B ◽  
Inhaled Budesonide ◽  
Moderate Persistent Asthma

Background: From a pathophysiologic point of view, asthma treatment is directed toward the airway to effectively suppress inflammation, attenuate airway hyper responsiveness. Ideally, this in turn should translate into benefits in terms of symptom control, prevention of exacerbations, optimizing dyspnoea, along with patient safety.Methods: This study was carried out at Department of Pharmacology and TB and Respiratory Medicine, Pt. BDS PGIMS, Rohtak, Haryana. The protocol was approved by institutional review board. Out of 60 OPD patients, group A (30) received inhaled budesonide 400μg and formoterol fumarate 6μg twice daily and group B (30) received oral montelukast 10 mg once daily along with inhaled budesonide 400μg twice daily. All values were expressed as mean±SEM and comparison between both groups was done using unpaired t-test.Results: Baseline PFT Values at 0 week and Improvement at 8 weeks were comparable between both groups with P-value >0.05. In Group A both day time cough/wheeze score (20.67±0.19 to 11.23±0.37) and night time cough/wheeze score (11.47±0.17 to 4.27±0.21) reduced after 8 weeks treatment. Also in Group B daytime cough/ wheeze reduced from (20.70±0.25) at 4 weeks to (12.93±0.43) at end of 8 weeks. Modified Borg’s dyspnoea score also decreased significantly (3.13±0.11 to 0.73±0.06) in Group A and (3.16±0.14 to 0.80±0.05) in Group B at end of 8 weeks and decrease was comparable in both groups (p value >0.05). Statistically there was no difference between two treatments as far as safety assessment was concerned. Most common ADRs reported were headache, asthenia and abdominal pain.Conclusions: Montelukast seems clinically effective and safe in controlling asthma symptoms, PFT and improving dyspnoea. So montelukast can be reasonable and alternative therapeutic option as add on to inhaled ICS in moderate persistent asthma patients.

scholarly journals Stem Cell Surgery and Growth Factors in Retinitis Pigmentosa Patients: Pilot Study after Literature Review

Biomedicines ◽  
2019 ◽  
Vol 7 (4) ◽  
pp. 94 ◽  
Author(s):  
Paolo Giuseppe Limoli ◽  
Enzo Maria Vingolo ◽  
Celeste Limoli ◽  
Marcella Nebbioso
Keyword(s):  
Retinitis Pigmentosa ◽  
Platelet Rich Plasma ◽  
Functional Results ◽  
Point Of View ◽  
Foveal Thickness ◽  
Restoration Technique ◽  
Number Of Patients ◽  
Group A ◽  
Cell Surgery ◽  
Group B

To evaluate whether grafting of autologous mesenchymal cells, adipose-derived stem cells, and platelet-rich plasma into the supracoroideal space by surgical treatment with the Limoli retinal restoration technique (LRRT) can exert a beneficial effect in retinitis pigmentosa (RP) patients. Twenty-one eyes underwent surgery and were divided based on retinal foveal thickness (FT) ≤ 190 or > 190 µm into group A-FT and group B-FT, respectively. The specific LRRT triad was grafted in a deep scleral pocket above the choroid of each eye. At 6-month follow-up, group B showed a non-significant improvement in residual close-up visus and sensitivity at microperimetry compared to group A. After an in-depth review of molecular biology studies concerning degenerative phenomena underlying the etiopathogenesis of retinitis pigmentosa (RP), it was concluded that further research is needed on tapeto-retinal degenerations, both from a clinical and molecular point of view, to obtain better functional results. In particular, it is necessary to increase the number of patients, extend observation timeframes, and treat subjects in the presence of still trophic retinal tissue to allow adequate biochemical and functional catering.

scholarly journals The Prevalence of the Ideas of Nationalism Among Young People (The Case of Young People of Yekaterinburg, Russia)

2021 ◽  
Author(s):  
Nadezhda Ivanovna Sivkova ◽  
Anastasia Nikolaevna Novgorodtseva ◽  
Elena Leonidovna Sysolyatina ◽  
Sergey Viktorovich Kunshchikov
Keyword(s):  
Young People ◽  
Risk Group ◽  
Point Of View ◽  
Sociological Research ◽  
Political Leaders ◽  
Technical Schools ◽  
Adequate Idea ◽  
Group A ◽  
The Media ◽  
The Stability

The ideas of nationalism in the practical discourse of the media and the speeches of politicians are often negative; the ideas of the superiority of some nationalities over others and the spread of conflicts are emphasized. From the point of view of scientific discourse, nationalism is perceived both as a negative and as a positive phenomenon for maintaining the stability and the fundamental strength of the state. The importance of studying the prevalence of the ideas of nationalism is associated with working with young people who often act as a “risk group,” that is, those who, failing to understand the depth of the process, are prone to sympathize and even participate in nationalist events and organizations. To identify the prevalence of nationalist orientations, a sociological survey was conducted in the form of an enquiry (N = 638) among various categories of young people (students in schools, colleges, technical schools, and universities). It is shown that among the young people there is no adequate idea of nationalism, which is often disguised as patriotism. A university student can most adequately assess the existence of nationalist orientations in publications on social networks, in the media, in the speeches of political leaders, therefore, schoolchildren and students of secondary vocational education are most susceptible to the development and distribution of nationalist ideas. A special group — a risk group — includes students in a difficult financial situation. Keywords: nationalism, patriotism, prevention of nationalism, youth, sociological research

scholarly journals TREATMENTS OF HEPATITIS C VIRUS LIVER CIRRHOSIS WITH PEGYLAT INTERFERON-RIBAVIRIN AND INTERFERON FREE – COMPARATIVE STUDY

2016 ◽  
Vol 19 (4) ◽  
pp. 218-221
Author(s):  
S.A. Florescu ◽  
◽  
S. Lazar ◽  
C. Oprea ◽  
A. Motoc ◽  
...  
Keyword(s):  
Liver Cirrhosis ◽  
Hepatitis C Virus ◽  
Hepatitis C ◽  
Side Effects ◽  
Adverse Effects ◽  
Therapy Group ◽  
Point Of View ◽  
Tropical Diseases ◽  
Group A ◽  
Group B

The article describes the adverse effects and efficiency of hepatitis C virus liver cirrhosis treatments available through the National Health Insurance Services, on a population of patients hospitalized at Victor Babes Infectious and Tropical Diseases Hospital, from 2012 to 2016. The population of patients was split into two distinct groups, for which we’ve recorded and comparatively analyzed demographic, clinical and paraclinical characteristics in a database. An evident success was recorded, from the point of view of hitting a clinical SVR index, in the DAA therapy group A, 87% percent compared to 2% in group B for the traditional standard therapy of PegInterferon + Ribavirin. Likewise, the number of adverse effects was lower in Group B versus Group A. Some side effects remained specific to the current cirrhosis treatment, which should be closely monitored.

scholarly journals THEORETICAL AND EXPERIMENTAL ANALYSIS OF ULTRASONIC WAVES PROPAGATION ON SYNTHETIC SANDSTONES WITH SPHERICAL HETEROGENEITIES

2018 ◽  
Vol 36 (3) ◽  
pp. 1
Author(s):  
Rafael S. G. Gomes ◽  
José J. S. de Figueiredo ◽  
Thiago P. Prestes ◽  
Lucas R. Nunes ◽  
Murillo J. Nascimento
Keyword(s):  
Theoretical Models ◽  
Ultrasonic Waves ◽  
Point Of View ◽  
Heterogeneous Samples ◽  
Synthetic Rock ◽  
Theoretical Predictions ◽  
Group A ◽  
First Arrival ◽  
Experimental Values ◽  
Group B

ABSTRACT. The manufacture of synthetic rock samples has a great importance in the study of the elastic properties of the rocks based on the variation of heterogeneities. For this work we constructed synthetic sandstones with different number of heterogeneities in the samples. We analyzed all samples from ultrasonic point of view (in dry and saturated condition). In total, twelve heterogeneous samples and an isotropic sample for reference were constructed. The heterogeneous samples were divided in three groups (A, B and C): group A with heterogeneities of 3.75-4.25 mm in diameter, group B with heterogeneities of 5-6 mm in diameter and group C with heterogeneities of 6.5-7.5 mm in diameter. From the first arrival picking on P- and S-waveforms, we calculated VP and VS velocities. We also compared the experimental velocities with ones predicted by the theoretical models of modified Maxwell-Garnett and the Kuster-Toksöz models. The theoretical predictions were made for the P and S velocities for the dry and saturated cases. In general, we noted that the best fit between the theoretical and experimental values occurred for the prediction of the modified Maxwell-Garnett model.Keywords: ultrasonic waves, effective model theories, synthetic samples, heterogeneous media.RESUMO. A fabricação de amostras de rochas sintéticas tem uma grande importância no estudo das propriedades elásticas das rochas com base na variação de heterogeneidades. Para este trabalho construímos arenitos sintéticos com diferentes números de heterogeneidades nas amostras. Analisamos todas as amostras do ponto de vista ultrassônico (em condição seca e saturada). No total, foram construídas doze amostras heterogêneas e uma amostra isotrópica para referência. As amostras heterogêneas foram divididas em três grupos (A, B e C): grupo A com heterogeneidades de 3,75 a 4,25 mm de diâmetro, grupo B com heterogeneidades de 5 a 6 mm de diâmetro e grupo C com heterogeneidades de 6,5 a 7,5 mm de diâmetro. A partir das escolhas de primeira chegada, tomando as formas de onda P e S, calculamos as velocidades VP e VS. Também comparamos as velocidades experimentais com as previstas pelos modelos teóricos dos modelos de Maxwell-Garnett e Kuster-Toksöz modificados. As previsões teóricas foram feitas para as velocidades P e S para os casos seco e saturado. Em geral, notamos que o melhor ajuste entre os valores teóricos e experimentais ocorreu para a predição do modelo de Maxwell-Garnett modificado. Palavras-chave: ondas ultrassônicas, teorias de modelos efetivos, amostras sintéticas, meios heterogêneos.

scholarly journals Neobvyklá žilná Cu-Zn-Ag-Pb-As-Sb-Se-Sn-Bi mineralizace z Jedové jámy u Vejprt v Krušných horách (Česká republika)

2020 ◽  
Vol 28 (2) ◽  
pp. 385-405
Author(s):  
Petr Pauliš ◽  
Zdeněk Dolníček ◽  
Roman Gramblička ◽  
Ondřej Pour
Keyword(s):  
Czech Republic ◽  
Mineral Assemblage ◽  
Point Of View ◽  
Ore Deposit ◽  
The Czech Republic ◽  
Quartz Veins ◽  
Group A ◽  
Native Bismuth

An extraordinary rich mineral assemblage consisting of 27 minerals has been newly discovered in quartz veins of the abandoned ore deposit, once exploited by the Drei König Mine, called also Giftschacht (Jedová jáma - Toxic shaft), situated approximately 2 km SE of Vejprty town. It includes 16 sulphides (plus one unnamed) with far prevailing arsenopyrite. In addition to common sulphides (chalcopyrite, sphalerite, galena and minerals of the tetrahedrite group), a wide suite of sulphosalts with substantial Bi-content was identified. Besides common bismuthinite and emplectite, also relatively rare Bi minerals (matildite, aikinite, hammarite, wittichenite), in the Czech Republic known from few localities only, have been found here. Bi is bound also in a rather exotic selenide bohdanowitzite and native bismuth. Bi is substantially present in some domains of tetrahedrites [tetrahedrite-(Zn), tennantite-(Zn) and tennantite-(Fe)]. In addition to local Bi enrichment, also Sn-minerals occur in the ore, represented by cassiterite and rare sulphides (kësterite and stannoidite). The presence of phosphates of the plumbogummite group [plumbogummite, goyazite and florencite-(Ce)] contributes to the remarkable mineral assemblage. From geochemical point of view, very interesting is the presence of florencite-(Ce), in which REE with dominating Ce are fixed. In addition, grains of fluorite, fluorapatite, rutile, topaz and aggregates of illite and a phase from kaolinite group are present. Supergene mineralization is represented besides limonite by abundant scorodite and rare strengite.

THROMBOLYTIC THERAPY IN UNSTABLE ANGINA: EFFECTS OF SHORT TERM HIGH DOSE INTRAVENOUS UROKINASE

1987 ◽  
Author(s):  
A Foresti ◽  
F Ambrosini ◽  
G Gentile ◽  
S Repetto ◽  
A Lotto
Keyword(s):  
Clinical Course ◽  
Point Of View ◽  
Control Group ◽  
Acute Ischemia ◽  
High Dose ◽  
Short Term ◽  
Ca Antagonist ◽  
Group A ◽  
Revascularization Procedures

20 Pts with U.A. admitted to CCU within 3 hours from onset of pain and ECG evidence of acute ischemia were studied. In 10 of them (UK Group) a bolus of high dose i.v. Urokinase (1500000 U) was added to conventional therapy -nitrates, ca-antagonist, heparin i.v.-. In the control group (C) no fibrinolytic drug was administered. Remission of pain was observed in 5/10 pts in UK and in 3/10 in C group in the first 3 hours. In the same time ECG markers of ischemia were virtually suppressed in 9/10 in UK and in 5/10 pts in C group. IIo pts in both groups had patological Q waves or CK elevation greater than twice normal, but in the first week 4/10 in UK and 5/10 in C group experienced one or more new acute ische mic attacks. Coronary angiography was performed:During follow-up (3 months) revascularization procedures (PTCA or CABPS) were performed in 5/10 pts in UK and in 5/10 pts in C groups.This study enphasizes the lack of difference from the anatomic point of view and the clinical course between the two groups of pts; nevertheless systemic fibrinoly sis performed in pts with U.A. may lead to an improvement of “very short term morbidity” and might be consi dered (as in acute myocardial infarction) a useful and safe treatment to offer these patients, often with impending M.I. to further and rapid revascularization procedures.

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