74 research outputs found
Identifying Loops In Almost Linear Time
No full textthis paper, we study and improve three recently proposed algorithms for identifying loops in an irreducible graph. The first algorithm we study is due to Havlak [1997]. We show that the running time of this algorithm is quadratic in the worst-case, and not almost-linear as claimed. We then show how to modify the algorithm to make it run in almost Author's address: G. Ramalingam, IBM T.J. Watson Research Center, P.O. Box 704, Yorktown Heights, NY, 10598, USA. E-mail: [email protected]
Investigating the Common Authorship of Signatures by Off-line Automatic Signature Verification without the Use of Reference Signatures
No full textIn automatic signature verification, questioned specimens are usually compared with reference signatures. In writer-dependent schemes, a number of reference signatures are required to build up the individual signer model while a writer-independent system requires a set of reference signatures from several signers to develop the model of the system. This paper addresses the problem of automatic signature verification when no reference signatures are available. The scenario we explore consists of a set of signatures, which could be signed by the same author or by multiple signers. As such, we discuss three methods which estimate automatically the common authorship of a set of off-line signatures. The first method develops a score similarity matrix, worked out with the assistance of duplicated signatures; the second uses a feature-distance matrix for each pair of signatures; and the last method introduces pre-classification based on the complexity of each signature. Publicly available signatures were used in the experiments, which gave encouraging results. As a baseline for the performance obtained by our approaches, we carried out a visual Turing Test where forensic and non-forensic human volunteers, carrying out the same task, performed less well than the automatic schemes
Medinilla johnii Kottaim. 2023, nom. nov.
No full text<p> <i>Medinilla johnii</i> Kottaim., <i>nom. nov.</i></p> <p> Replaced name:— <i>Medinilla parvifolia</i> Baker (1883: 149) <i>nom. illeg.</i>,</p> <p> non <i>Medinilla parvifolia</i> Seemann (1866: 89).</p> <p> Lectotype (designated here):— MADAGASCAR. <i>s.loc.</i>, <i>R. Baron 2784</i> (P, barcode P00412868!; isolectotype: E, barcode E00681456!, K, specimen with barcode K000242535!).</p> <p>Etymology:—Named after John Gilbert Baker (1834-1920), author of the replaced name.</p> <p>Distribution:— Madagascar (Provinces of Antsiranana & Antananarivo). Endemic (POWO 2023).</p> <p>Habitat: Widespread species commonly seen in rock outcrops, slopes, peaks and rainforest from 1000 to 2000 m altitude (Perrier 1951).</p> <p> Notes: Baker (1883) described <i>Medinilla parvifolia</i> based on the collections of Baron from Central Madagascar, but he did not mention collection dates and numbers in the protologue. According to Stafleu & Mennega (1992), Baron’s collections are mainly at K. Substantial duplicate sets are at B, BM, E, G, MO, P, TAN and W. I have traced six sheets from four different herbaria, one each at E [E00681456G] and G [G00316247], two from P [P00412868, P00412869] and the other two sheets are in K, of which two of the collections are mounted on a single sheet [K000242534, K000242535]. Of these, the best preserved specimen, P00412868, is designated here as the lectotype as it agrees well with the protologue.</p>Published as part of <i>Kottaimuthu, Ramalingam, 2023, Medinilla johnii, a new name for Medinilla parvifolia Baker (Melastomataceae), pp. 269-270 in Phytotaxa 598 (3)</i> on page 269, DOI: 10.11646/phytotaxa.598.3.10, <a href="http://zenodo.org/record/7969904">http://zenodo.org/record/7969904</a>
Atypical Atrial Fibrillation – How is it different from Typical Atrial Fibrillation: A Review Article
No full textAbstract: Atrial fibrillation is the most common type of treated heart arrythmia and it is characterised by palpitations, sometimes fatigue, tiredness, presyncope, breathlessness, and chest discomfort. But palpitation is a cardinal symptom and defines Atrial Fibrillation. Based on the clinical presentation, Atrial fibrillation can be categorised as typical, with palpitations with or without other symptoms, and Atypical AF with symptoms other than palpitations. There can be a completely asymptomatic presentation that is called silent Atrial fibrillation.
Keywords: Atypical Atrial Fibrillation, Typical Atrial Fibrillation, Palpitations, Cryptogenic Stroke, Bleeding, Thromboembolism.
Title: Atypical Atrial Fibrillation – How is it different from Typical Atrial Fibrillation: A Review Article
Author: Archana Ramalingam, Aneela Satya Ravanam, Priyadharsini D Kailasam
International Journal of Healthcare Sciences
ISSN 2348-5728 (Online)
Vol. 10, Issue 2, October 2022 - March 2023
Page No: 208-212
Research Publish Journals
Website: www.researchpublish.com
Published Date: 06-February-2023
DOI: https://doi.org/10.5281/zenodo.7613044
Paper Download Link (Source)
https://www.researchpublish.com/papers/atypical-atrial-fibrillation--how-is-it-different-from-typical-atrial-fibrillation-a-review-articleInternational Journal of Healthcare Sciences, ISSN 2348-5728 (Online), Research Publish Journals, Website: www.researchpublish.co
3D Face Recognition: Feature Extraction Based on Directional Signatures from Range Data and Disparity Maps
No full textIn this paper, the author presents a work on i) range data and ii) stereo-vision system based disparity map profiling that are used as signatures for 3D face recognition. The signatures capture the intensity variations along a line at sample points on a face in any particular direction. The directional signatures and some of their combinations are compared to study the variability in recognition performances. Two 3D face image datasets namely, a local student database captured with a stereo vision system and the FRGC v1 range dataset are used for performance evaluation
On the value of relative comparisons in firms
No full textIn a principal-agent model, we find that firms may not always benefit from the relative concerns of agents if such concerns are heterogeneous. Further, accounting for the influence of the environment on such concerns, profits are reduced relative to the no-comparisons benchmark
PARAMETRIC STUDY ON THE HYDRODYNAMIC RESPONSE OF DSI POLYGONAL SHAPED FPSO
No full textIn the present paper, numerical investigations was carried out on a 1:45 scaled model of DSI nine sided polygonal non-ship shaped FPSO, by varying different parameters of the model. Parameters such as inlet pipe radius, and moonpool radius was considered for the study and the variation of the RAO in surge and heave were plotted and reported in the present paper. Previously, experiment were conducted by the author on a 1:45 scale DSI nine sided polygonal non-ship shaped FPSO model with three different mooring arrangements viz. 100% turret mooring, 50% vessel and 50% turret mooring, and 100% vessel mooring. Author also conducted experiments on the model with different sizes of damping plates attached at the keel and skirt portion of the model to study its influence on the responses of the vessel and comparison was made with numerical result obtained from Wave analysis, MIT (WAMIT) software. Numerical study was carried out in WAMIT on the scaled model and the results were compared with those obtained from model tests in the wave basin
A Facile Synthesis of Sn-Doped CeO2 Nanoparticles: High Performance Electrochemical Nitrite Sensing Application
No full textDevelopment of novel electrode materials for sensing water pollutant like nitrite, nitrate, paramedical pollutants and fertilizers is a more promising research area in electrochemical sensor field. Various pure as well as doped metal oxides were used as electrodes for sensing the water pollutants but, deficits in stability, reproducibility and real time analysis. In the present work, a promising Sn-doped CeO2 based sensor was fabricated for sensing nitrite in water. A selective concentration of Sn (5%) doped CeO2 nanoparticles were synthesized by facile chemical precipitation method. The structural, optical and morphological information were studied using various techniques. The morphological of the sample was revealed an agglomerated with spherical nanoparticles with size of 8.5 nm. The synergistic effect of Sn-CeO2/GCE improves the electrochemical behavior of nitrite on the modified surface. Sn-doped CeO2 nanoparticles has a better surface property and provides a more fine-grained media to facilitate electron transfer during the reaction between analyte and electrode. The Sn-CeO2/GCE electrode possesses excellent electrocatalytic oxidation of nitrite (NO2–) which was investigated by cyclic voltammetry (CV) and amperometry techniques. The remarkable sensitivities of nitrite were found that 245.4 µA cm−2 mM−1 and 89.53 µA cm−2 mM−1 with R2 = 0.999 and RSD of ∼ 6%. Similarly, the limit of detection (LOD) towards nitrite ion sensing was found to be 16 nM. The real time application of Sn-CeO2/GCE sensor was demonstrated by the detection of nitrite present in environmental water samples with excellent recoveries. Hence, Sn-doped CeO2 modified electrode also demonstrates good reproducibility, long time stability, and excellent selectivity properties. Thus, a developed electrochemical sensor possesses a novel promise for the construction of simple and sensitive nitrite analytical stage. © 2021 Elsevier B.V.The authors thank Chancellor, President and Vice Chancellor, Sathyabama Institute of Science and Technology, Chennai for the support and encouragement. The author R. Jothi Ramalingam thank for the financial support by the Researchers Supporting Project Number (RSP-2021/354), King Saud University, Riyadh, Saudi Arabia
Endoscopic Management of Free Lying Migratory Orthopedic Screw in Bladder
No full textAbstract75-year old gentleman presented with acute urinary retention. He had met with road traffic accident 15 years back and sustained pelvic fracture and bladder rupture, underwent bladder repair and open reduction and internal fixation of pubic symphsis. Imaging studies showed the free lying encrusted orthopedic screw in the bladder, which was removed per urethra using nephroscope. Migratory foreign bodies in the urinary bladder are rare. However there is a possibility of longstanding foreign bodies in adjacent structures to erode and perforate into the bladder. Inside the bladder these foreign bodies act as nidus for stone formation
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