39,484 research outputs found
Fixed and coincidence points of hybrid mappings
No full textsummary:The purpose of this note is to provide a substantial improvement and appreciable generalizations of recent results of Beg and Azam; Pathak, Kang and Cho; Shiau, Tan and Wong; Singh and Mishra
Informetrics on M. N. Srinivas
No full textM. N. Srinivas, the well known sociologist is widely recognised as architect of modern Indian sociology and social anthropology. His publications have been analysed by year, domain, authorship pattern, channels of communication used. Keywords, etc. The results indicate that the papers published by him are of a nature that qualify him to be a 'role model' for the younger generations to emulate.
By the end of 1995, Srinivas had to his credit 144 papers which, included 33 broad papers in sociology and anthropology; 18 papers in social change; 28 papers in village studies; 12 papers on religion; 17 papers on caste and 36 papers of general popular interest. The periods 1958-61 and 1974-77, when Srinivas was 38-41 and 58-61 years old. were his most productive periods with highest publication activity
Enhanced photocatalytic degradation of organic pollutants in water by g-C3N4/N-TiO2/Y1.97SiO5:Ce0.03 heterostructure
No full textA novel ternary heterostructure based on g-C3N4/N-TiO2/Y1.97SiO5:Ce-0.03 was synthesized via thermal treatment and evaluated for the photocatalytic degradation of two antibiotic pollutants, chloramphenicol (CAP) and vancomycin (VAN), in aqueous solution. The composite was designed to function as a photoactive platform, in which Ce3+-doped Y2SiO5 acts as an internal light converter, emitting at similar to 430 nm upon UV excitation (365 nm) to enhance activation of the g-C3N4/N-TiO2 interface. Structural and morphological characterizations (WAXD, FTIR, XPS, TEM) confirmed the formation of a well-integrated heterostructure with strong interfacial interactions. The photocatalyst achieved near-complete removal of CAP (99.7 %) and VAN (100 %) under UV light, and also showed high efficiency under simulated solar irradiation and in real water matrices. These results demonstrate the synergistic light-conversion and charge-transfer properties of the composite, underscoring its potential as a sustainable and scalable solution for antibiotic pollutant removal in water treatment applications
Some fixed point theorems in metric spaces by altering distances
No full textsummary:A generalization is obtained for some of the fixed point theorems of Khan, Swaleh and Sessa, Pathak and Rekha Sharma, and Sastry and Babu for a self-map on a metric space, which involve the idea of alteration of distances between points
Illuminaçao Apologetica do retrato de Morteçor en que aparecem com mais vivas côres os erros do author do novo Methodo, e seu Apologista ...
No full textFecha sacada de la pág.2 y 159Sign.: A-V\p4\sError tipográfico de signatura : a B\b2\s llama B\b3\
From the correspondence of M. P. Drahomanov: two unknown letters to M. V. Vodovozov of 1894
No full textThis publication introduces into scientific discourse little-known letters of prominent Ukrainian scholar, politician and publicist M. P. Drahomanov (1841-1895), discovered in the fond of V. I. Vernadsky in the Archive of the Russian Academy of Sciences in Moscow. Two letters written in the latest period of the life of M. P. Drahomanov, which are addressed to young economist and publicist Mykola Vasyliovych Vodovozov (1870-1896), expand the source base not only for M. P. Drahomanov’s biographers. They show his ties with Russian liberals, who later formed the core of the party of constitutional democrats. A preface to the publication contains a biography of M. V. Vodovozov, and the author makes a hypothesis on the history of an acquaintance of the correspondent and the addressee, which could be connected with M. V. Vodovozov’s brother, V. V. Vodovozov, and members of the “Shelter Fraternity”, and through them with M. P. Drahomanov. The analysis of the published letters proves that M. P. Drahomanov endeavored to widen through the “Shelter Fraternity” members his contacts with democratic circles in Russia, and also to find financial support for publishing letters of Bakunin and Struve
V. BRUSOV’S ARTICLE ON M. LOMONOSOV. INTRODUCTORY REMARKS BY IRINA ATAJANYAN (YEREVAN)
No full textThe author publishes V. Brusov’s paper «On Lomonosov». According to V. Brusov, M. Lomonosov is «the father of the Russian literature». Significantly, V. Brusov overlooked M. Lomonosov’s poetry, with a view towards his works on prosody. The publication’s author concludes that V. Brusov intended to write a research paper on M. Lomonosov’s life and creativity
Two-dimensional semiconductor alloys: Monolayer Mo1-xWxSe2
No full textMonolayer Mo1-xWxSe2 (x = 0, 0.14, 0.75, and 1) alloys were experimentally realized from synthesized crystals. Mo1-xWxSe2 monolayers are direct bandgap semiconductors displaying high luminescence and are stable in ambient. The bandgap values can be tuned by varying the W composition. Interestingly, the bandgap values do not scale linearly with composition. Such non-linearity is attributed to localization of conduction band minimum states around Mo d orbitals, whereas the valence band maximum states are uniformly distributed among W and Mo d orbitals. Results introduce monolayer Mo1-xWxSe2 alloys with different gap values, and open a venue for broadening the materials library and applications of two-dimensional semiconductors
The long-wavelength view of GG Tau A: rocks in the ring world
No full textWe present the first detection of GG Tau A at centimetre wavelengths, made with the Arcminute Microkelvin Imager Large Array at a frequency of 16 GHz (λ = 1.8 cm). The source is detected at >6 σrms with an integrated flux density of S16GHz = 249 ± 45 µJy. We use these new centimetre-wave data, in conjunction with additional measurements compiled from the literature, to investigate the long-wavelength tail of the dust emission from this unusual protoplanetary system. We use an MCMC-based method to determine maximum likelihood parameters for a simple parametric spectral model and consider the opacity and mass of the dust contributing to the microwave emission. We derive a dust mass of Md ~ 0.1 Msun, constrain the dimensions of the emitting region and find that the opacity index at λ > 7 mm is less than unity, implying a contribution to the dust population from grains exceeding ~4 cm in size. We suggest that this indicates coagulation within the GG Tau A system has proceeded to the point where dust grains have grown to the size of small rocks with dimensions of a few centimetres. Considering the relatively young age of the GG Tau association in combination with the low derived disc mass, we suggest that this system may provide a useful test case for rapid core accretion planet formation models
Lessons from diagnosis-prescribing and antibiotic resistance surveillance in Ujjain, India : the lull before the storm
No full textBackground: The evolution of antibiotic resistance is a global public health crisis building over decades. In this build-up antibiotic use has been the main driver for antibiotic resistance. To develop context-specific interventions, effective surveillance of antibiotic use and resistance are needed in counties like India, which have witnessed a rapid rise in resistance recently and where the need for effective antibiotics is high.Aim: The main aim of this thesis is to increase the knowledge regarding antibiotic prescribing patterns and prevalence of resistance in an Indian setting, so as to identify targets for interventions aimed to improve clinical practice for common infections.Methods: This thesis includes five cross-sectional studies. Paper I and paper II describes the patterns of antibiotic prescribing for outpatients with suspected infectious aetiology and among admitted patients, respectively. The defined daily doses (DDDs) were calculated per 1000 patients per diagnosis considered in paper I. Focus of infection specific DDDs were calculated per 100 patient days in paper II. In paper III, prescriptions for children with diarrhoea were analysed for adherence to treatment guidelines and factors associated with adherence were explored. In paper IV healthy children were screened for nasal carriage of S. aureus to identify factors associated with nasal carriage and to describe the resistance patterns. Paper V describes the antibiotic susceptibility pattern of pathogens isolated from patients with suspected infections. Antibiotic susceptibility testing was performed by Kirby-Bauer disk-diffusion method. All the studies were done using structured, pilot tested questionnaires.Results: Overall antibiotic prescribing was 66.3%, 3732 out of 5623 outpatients (Paper I) and 92%, 5531 out of 6026 admitted patients (Paper II). Quinolones were the most frequently prescribed antibiotic group among outpatients and third generation cephalosporins among the admitted patients (Paper I and II). For diarrhoea in children only 6 out of 843 prescriptions adhered completely to treatment guidelines. Oral rehydration solution (ORS) was prescribed for 58%, ORS with zinc for 22% and antibiotics for 71% of the cases (Paper III). The prevalence of nasal carriage of S. aureus was 98 out of 1562 i.e. 6.3% (95% confidence interval [CI] 5.1-7.5). Of these, 16.3% were methicillin-resistant S. aureus (MRSA). Overcrowding was associated with nasal carriage of S. aureus (Paper IV). Among pathogens (n=716) isolated form admitted patients (n=2568), Gram-negative pathogens predominated (62%). Extendedspectrum β-lactamase (ESBL) production in E. coli isolates (n=149) was 69% (95% CI 61.6–76.6) and in K. pneumoniae isolates (n=107), 41% (95% CI 31.6–50.5). MRSA constituted 30% of all S. aureus isolates (n=221).Conclusions: The targets identified for interventions were: high antibiotic prescribing rates for diarrhoea (Paper I, II and III) and upper respiratory tract infection (Paper I). Other targets include, longer than recommended duration of prophylaxis (86% of 1846 patients) and lack of distinction between prophylaxis and therapy among surgical patients, irrational antibiotic prescribing in gastroenteritis, overuse of quinolones and lack of use of penicillin in pneumonia, overuse of quinolones and lack of use of doxycycline and macrolides in genital infections, and overreliance on antibiotics in treating skin and soft tissue infections (Paper II). The high rate of antibiotic prescribing among admitted patients together with the high rates of ESBL producing pathogens shows urgent need to curb antibiotic use when there is no indication for it (Paper V).List of scientific papersI. Pathak A, Mahadik K, Dhaneria SP, Sharma A, Eriksson B, Stålsby Lundborg C. Antibiotic prescribing in outpatients: Hospital and seasonal variations in Ujjain, India. Scand J Infect Dis. 2011 Jul, 43(6-7): 479-88. https://doi.org/10.3109/00365548.2011.554854 II. Pathak A, Mahadik K, Dhaneria SP, Sharma A, Eriksson B and Stålsby Lundborg C. Surveillance of antibiotic consumption using “focus of infection” approach in Ujjain, India. [Submitted]III. Pathak D, Pathak A, Marrone G, Diwan V, Stålsby Lundborg C. Adherence to treatment guidelines for acute diarrhoea in children up to 12 years in Ujjain, India-a cross-sectional prescription analysis. BMC Infect Dis. 2011 Jan 28; 11:32. https://doi.org/10.1186/1471-2334-11-32 IV. Pathak A, Marothi Y, Iyer RV, Singh B, Sharma M, Eriksson B, Macaden R, Stålsby Lundborg C. Nasal carriage and antimicrobial susceptibility of Staphylococcus aureus in healthy preschool children in Ujjain, India. BMC Pediatr. 2010 Dec 29; 10:100. https://doi.org/10.1186/1471-2431-10-100 V. Pathak A, Marothi Y, Kekre V, Mahadik K, Macaden R and Stålsby Lundborg C. High prevalence of extended-spectrum β-lactamase producing pathogens: Results of a surveillance study in 2 hospitals, Ujjain, India. Infect and Drug Resist. 2012, 5:65-73. https://doi.org/10.2147/IDR.S30043 </p
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