1,593 research outputs found
ENTIRE FUNCTIONS SHARING POLYNOMIALS WITH THEIR DERIVATIVES
No full textIn this paper we study the uniqueness of entire functions sharing two polynomials with their derivatives. The results of the paper improve the corresponding results of Chang and Fang (Kodai Math.J. 25(2002), 309–320) and Lahiri-Ghosh(Present author) (Analysis ,Munich. 31(2011), 47–59)
Scientometric Portrait of Homi Jehangir Bhabha: The Father of Indian Nuclear Research Programme
No full textQuantitative and qualitative analysis with graphic representation of the publication productivity of a scientist facilitates easy and clear perception about the work of a scientist. Bhabha’s scientific work spanned over more than three decades (1933-1967) during which he published 104 publications, which could be classified into nine fields: Interaction of Radiation with Matter (4), Quantum Electrodynamics (5), Mathematical Physics (2), Cosmic Ray Physics (18), Elementary Particle Physics (14), Field Theory (15), General Physics (2), Nuclear Physics (4) and General (40). The highest number of publications (6) were published in 1941, 1945 and 1964 respectively. The average number of publications published per year was 3.05. His productivity coefficient was 0.05 which is a clear indicates that his publication productivity was quite consistent throughout his scientific career. He was single author in 79 of his publications and the main author in 24 publications indicates that he always preferred to work himself and lead the team as ‘mentor’. Bhabha had 22 collaborators during the period. Team of research collaborators working with a successful scientist documents the sociological aspect of history of science while generating knowledge by a leader in a domain.
Bhabha became a citable author in 1937. Bhabha received 1211 citations to his 30 publications out of 104 publications. Out of 104, 74 publications did not receive any citations. Out of 74 publications, 40 publications dealt subjects mainly of general interest. Bhabha’s 86.66 percent of cited publications received their first citations within four years of their publication indicates that his publications were noticed immediately and had direct impact among the fellow researchers working all over the world. His overall citation rate was 11.64 per cited publication. The highest citations 389 were received to the domain ‘Cosmic ray physics’. The highest number of citations received were 45 in 1938. His self-citations were only 24 (1.98%) and citations by others were 1187 (98.02%). The highest self citations were six in 1946. Bhabha’s mean diachronous self-citation rate was 1.98. The highest citation rate 28.4 was to the domain ‘Quantum electrodynamics. His single authored publications have received the highest number 863 (71.26%) of citations. Bhabha’s five publications have been cited more than 100 times each. His publications have been cited by the authors working in various diverse fields like nuclear physics, mathematical physics, instrumentation, optics, geophysics and geochemistry, condensed matter physics, applied physics, electrical and electronic engineering, mechanical engineering etc., indicating a very diverse influence and impact of Bhabha’s publications. Bhabha’s publications have also been cited by the Nobel laureates like V. L. Ginzberg, Wolfgang Pauli, H. A. Bethe, M. Born, W. Bothe, E. P. Wigner, H. Yukawa, P. M. S. Blackett and C. N. Yang which is an indication of his originality of ideas and high quality of publications
Bilateral congenital lacrimal fistulas in an adult as part of ectrodactyly-ectodermal dysplasia-clefting syndrome: A rare anomaly
No full textEctrodactyly-ectodermal dysplasia and clefting syndrome or "Lobster claw" deformity is a rare congenital anomaly that affects tissues of ectodermal and mesodermal origin. Nasolacrimal duct (NLD) obstruction with or without atresia of lacrimal passage is a common finding of such a syndrome. The authors report here even a rarer presentation of the syndrome which manifested as bilateral NLD obstruction and lacrimal fistula along with cleft lip and palate, syndactyly affecting all four limbs, mild mental retardation, otitis media, and sinusitis. Lacrimal duct obstruction and fistula were managed successfully with endoscopic dacryocystorhinostomy (DCR) which is a good alternative to lacrimal probing or open DCR in such a case
Classical and quantum machine learning applications in spintronics
No full textIn this article we demonstrate the applications of classical and quantum
machine learning in quantum transport and spintronics. With the help of a
two-terminal device with magnetic impurity we show how machine learning
algorithms can predict the highly non-linear nature of conductance as well as
the non-equilibrium spin response function for any random magnetic
configuration. By mapping this quantum mechanical problem onto a classification
problem, we are able to obtain much higher accuracy beyond the linear response
regime compared to the prediction obtained with conventional regression
methods. We finally describe the applicability of quantum machine learning
which has the capability to handle a significantly large configuration space.
Our approach is applicable for solid state devices as well as for molecular
systems. These outcomes are crucial in predicting the behavior of large-scale
systems where a quantum mechanical calculation is computationally challenging
and therefore would play a crucial role in designing nano devices.Comment: 9 pages, 8 figure
Freely available online information sources and their impact on libraries and information centres
No full textSince past few years free online information sources like e-journals, e-books, e-data- bases have increased cnsiderably. The traditional library systems are going to transform into digital library systems and different projects like Gutenberg e-book project, Virginia Tech. Digital Library Project, University of California Digital Library project etc. have been undertaken. The author has started to compile the links of such freely available online information sources on the Internet at URL: http://www.geocities.com/ ghosh_tbd and described the same in this paper. The paper also describes the impact on collection development, budget and technical processing etc. of the Library and Information centre
Laparoscopic cholecystectomy in double gallbladder with dual pathology
No full textDouble gallbladder is a rare embryological anomaly of clinical significance. Despite availability of modern imaging, only 50% of recently reported cases had preoperative diagnosis, which is desirable in every case to avoid serious operative complications. Double pathology in double gallbladder is extremely rare with only 3 reporting′s available till date to the best of author′s knowledge. With a preoperative diagnosis of double gallbladder, laparoscopic cholecystectomy can be safely and successfully performed with meticulous dissection, aided by operative cholangiogram. However in all such attempts a lower threshold should be kept for conversion to open surgery. Awareness about this anomaly amongst radiologists and surgeons is of crucial importance. Double gallbladder does not present with any specific symptom, neither it increases disease possibility in either lobe. Prophylactic cholecystectomy has no role in asymptomatic cases diagnosed accidentally. Author reports a case of a symptomatic young male with double gallbladder who presented with short history of dyspepsia, abdominal pain and fever. Definite preoperative diagnosis was reached with ultrasound scan and magnetic resonance cholangio pancreatography and subsequently dealt with laparoscopically. Calculous cholecystitis affected one lobe and acalculous empyema the other. While the 1st lobe drained though a cystic duct into common bile duct (CBD), the 2nd was without any communication with either CBD or its counterpart, thus remained as a blind vesicle
Dynamics of Organic Carbon Molecules in Oxbow Lakes of Gangetic Plains
No full textThe Ganges Delta is a key area where elemental contamination of groundwater constitutes a human catastrophe. The delta plain geomorphology comprises a large number of abandoned meander bends or oxbow lakes (Donselaar et al., 2017; Ghosh et al., 2021) characterized by an anoxic environment in the lower part of the lake water column (hypolimnion). Here we present the critical role of these abandoned-river channels forming oxbow lakes. The geomorphological the juxtaposition of (a) abandoned channels (or: oxbow lakes) where the cocktail of organic matter and sediment leads to the release of various elements, (b) the topographically higher point bars where the released elements accumulate in the aquifer and provide a blueprint to explain the origin and localization of elemental toxicity. Dissolved organic matter (DOM) is implicated in the mobilization of elements via microbial metabolic processes. Organic matter (OM) is preserved in this environment and provides a perfect environment for microbial oxidation and mobilization of Fe-oxides. Additional deposition of human-introduced sewage wastes adds to a rich source of nutrients to the indigenous microbial communities.A multidisciplinary approach was effective in understanding the geomorphology of river meanders, forming abandoned channels, which act as a growth bed for biomass. While acting as an incubator for primary production (lake vegetation dynamics), and subsequent organic debris accumulation (anoxic, hypolimnion water column), where selective preferential preservation of organic carbon compound (anoxic sediment base) occur. We have described how organic compound infiltration, deposition and abundance depends on their hydrophobicity, molecular weights and bioavailability and further, due to diagenetic alteration (microbial metabolic oxidation). Different classes of surface derived organic carbon from vegetation with anthropogenic inputs, can have different effects on the mineral weathering and in controlling the downstream cationic fluxes such as Fe, Mn, As, F etc. and contamination of aquifers in various river plains across the world.Applied Geolog
Novel active pharmaceutical ingredients from India: The issues—part-II
No full textIndia has made a mark by discovering at least 16 novel synthetic active pharmaceutical ingredients (APIs). However, this number is quite small when compared with the number of APIs invented the world over in the allopathic system of medicines, the numbers of which according to the estimate of the author stand at more than 5000, of which presently nearly 3000 numbers are in therapeutic use against human diseases/ailments. In India, nearly 2200 numbers of these APIs are presently in use. India has made a mark in the supply of branded generic and generic formulations for use in the country and abroad in an environment of cut-throat competition. To maintain and improve the mark, India needs to carry out R&D not only for process innovation but would also have to invest and invent novel APIs. The analysis shows that the present investment in R&D and the policies followed for promoting research for new drug development are not adequate for the country to be dominant global player. Suggestions have been made to improve the present situation
Evaluating and Predicting the Risk of Algal Blooms in a Freshwater Lake through a 4-Dimensional Approach: A Case Study on Lake Mitchell
No full textExcessive algal growth in freshwater lakes can negatively impact ecosystems, recreation, and human health. Though algae are a natural part of freshwater ecosystems, elevated nutrient loading from anthropogenic and natural sources can lead to algal blooms. Both algae and blue-green algae (BGA) are responsible for algal blooms; however, BGA (cyanobacteria) is more dangerous. The first objective of this research was to prepare a conceptual model to understand how various environmental variables affect algae. This conceptual model was used to choose the environmental variables that help increase or decrease algae in the water environment. The second objective was to develop empirical equations to identify how the environmental variables are helping algal increase or decrease. Lake Mitchell, near Mitchell, SD, was chosen as a case study to collect the data of the environmental variables. Along with the total algae (Total algae = Chlorophyll-a + Phycocyanin), five variables: (1) conductivity, (2) temperature, (3) fluorescent dissolved organic matter, (4) ammonium, and (5) dissolved oxygen, were collected. Algae concentrations can change temporally, vertically within the water column, and spatially across lakes and thus, a four-dimensional approach was used to accurately quantify alga
From the Individual to the Historical: a Commentary on Amitav Ghosh as a Writer of Historical Fiction with Reference to the Glass Palace
No full textAmitav Ghosh is widely known as a historical novelist in Indian Writing in English. He recreates the colonial past of the subcontinent from the colonized point of view. However, he is not one who merely recreates history. He is appreciated for writing history with life. He narrates the story of an individual who often turns out to be the representative of a community and its untold history. The Glass Palace is one such novel that recreates the history of the colonial past of India and Burma. The focus is mainly on the life of Rajkumar who is an Indian orphan struggling to survive in Burma after being unfortunately transported to the country by accident. This paper is an analysis of Ghosh's novel, The Glass Palace in order to show how the author recreates a lively history by narrating the life story of his protagonist
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