90 research outputs found
Comparison of several author indices for gauging academic productivity
No full textBackground
Many author indices exist to gauge academic productivity. Several of these indices are calculated based upon an author's scholarly publication record, but the measurement methodology to calculate each index varies considerably, and the precise function being used, as well as the end result, is often complex and difficult to assess.
Method
Two straightforward methods to weigh author productivity from the publication and citation record were evaluated as possible means for providing a clearer assessment of scholarly activity. The author characteristic index (termed c-index) assigns author rank for each publication based upon author position. The characteristic prime (c') -index normalizes author rank from author position, so that the total weight per publication is unity. The top 10 scholars with keyword 'celiac disease' in the Google Scholar database were then assessed using these metrics. Rankings according to total number of publications, h-index, and c- and c'-indices were compared, then tabulated along with total papers included for assessment, and mean values per paper for author position, number of authors, citations, and year of publication.
Results
The order of the top ten authors with keyword 'celiac disease' varied substantially depending upon whether the h-index, c-index, or c'-index was used as a gauge. The characteristic indices assign credit to authors according to their position in an author list. The affiliated metrics provided a more complete picture of scholarly activity.
Conclusions
Academic achievement by scholars, based upon quantitative publication characteristics, has recently become of interest for evaluating job candidates, for determining work performance, and for bestowing awards and honors. The characteristic indices as described herein are readily calculated and interpreted, and may improve the assessment of scholarly activity
Cooling, transport and mixing of ultracold K and Cs
No full textSeit den frühen 1980er Jahren gibt es Vorschläge, große quantenmechanische Systeme zu untersuchen, die für klassische Computer unzugänglich sind, indem sie direkt über ein anderes gut kontrolliertes Quantensystem simuliert werden. Das Aufkommen von Quantengasexperimenten, die auf bahnbrechenden Fortschritten bei der Laserkühlung und dem Einfangen von Atomen aufbauen, beispielhaft dargestellt durch die erste Realisierung eines quantenentarteten Gases im Jahr 1995, hat danach zu einem ganzen Spektrum experimenteller Bemühungen geführt, um hochgradig kontrollierbare Quantensysteme zu realisieren, die zur Durchführung von Quantensimulationen verwendet werden können. Unter den verschiedenen möglichen Plattformen sind polare Bialkali-Moleküle besonders interessant, da sie über abstimmbare, langreichweitige Dipol-Dipol-Wechselwirkungen interagieren. In Kombination mit kürzlich entwickelten Werkzeugen, die eine ortsaufgelöste Abbildung und Adressierung von gittergebundenen Atomen ermöglichen, stellt ein solches System ein vielseitiges Werkzeug zur Untersuchung verschiedener Quantenphänomene bereit. Diese Dissertation konzentriert sich auf die Realisierung mehrerer wichtiger Schritte zur Realisierung eines solchen Quanten-Toolkits unter Verwendung von K- und Cs-Atomen.
Die hochauflösende Abbildung von Atomen, die in einem Gitter gefangen sind, benutzt das Prinzip der Laserkühlung, um zu verhindern, dass die Atome zwischen Gitterstellen tunneln, während das gestreute Licht aufgesammelt wird. Die Auflösung eines solchen Abbildungssystems ist direkt proportional zur Wellenlänge des für die Laserkühlung verwendeten Lichts. In diesem Zusammenhang demonstrieren wir eine Sub-Doppler-Laserkühlung von 39 K unter Verwendung einer entarteten Raman-Seitenbandkühlung über den 4S1/2 5P1/2-Übergang bei 404,8 nm. Im Gegensatz zu den Standard-Laserkühltechniken, die auf den D2- und D1-Übergängen beruhen, wird hier ein hochangeregtes Niveau in den Kühlzyklus integriert.
Die hochauflösende Abbildung kalter Atome erfordert einen guten optischen Zugang. Es liegt daher nahe, den Ort der Erzeugung des Quantengases und die eigentliche Experimentierkammer räumlich zu trennen. Allerdings braucht es dann einen Transport der ultrakalten Atome. Wir stellen mehrere Ansätze und die damit verbundenen Herausforderungen bei der Entwicklung eines geeigneten Transportsystems für unser Experiment vor und schließen mit der Entwicklung eines neuen, auf Moiré-Linsen basierenden, kompakten und robusten Aufbaus, um ultrakalte Atome optisch über große Entfernungen zu transportieren.
Eine Beschreibung der Weiterentwicklung eines parallelen Mischschemas zur Herstellung ultrakalter K-Cs-Mischungen, das den experimentellen Ablauf und Aufwand deutlich vereinfachen soll, wird nachfolgend diskutiert. Zusätzlich wird die Entwicklung einer neuen Experimentierkammer beschrieben. Eine neue solche Kammer ist erforderlich geworden, da in der bestehenden die Vakuumqualität nicht ausreicht. Gleichzeitig gelingt es damit, die Anforderungen an optischem Zugang und Kontrolle des elektrischen Feldes optimal zu erfüllen.
Abschließend wird eine Zusammenfassung der Arbeiten zur Untersuchung der Bandstruktur des Kagome-Gitters präsentiert. Diese Arbeit wurde während eines Forschungsaufenthalts an der University of California, Berkeley, durchgeführt, der durch das Doktoratskolleg "Atoms, Light, and Molecules" in Innsbruck ermöglicht wurde.Proposals to study large quantum mechanical systems that are intractable to classical computers by directly simulating them via another well controlled quantum system have existed since the early 1980s. The emergence of quantum gas experiments building upon pioneering advances in laser cooling and trapping of atoms, exemplified by the first realization of a quantum degenerate gas in 1995, has thereafter given rise to an entire spectrum of experimental efforts to realize highly controllable quantum systems that can be used to carry out quantum simulations. Among the various possible platforms, bialkali polar molecules are especially interesting since they interact via tuneable, long-range dipole-dipole interactions. Combined with more recently developed tools that allow imaging and addressing of lattice bound atoms in a site resolved manner, such a system provides a versatile toolkit to study various quantum phenomena. This thesis is focused on the realization of several important steps towards the realization of such a quantum toolkit using K and Cs atoms.
High resolution imaging of atoms trapped within a lattice relies on laser cooling to prevent the atoms from tunneling between lattices sites, and collecting the light scattered during this process. The resolution of such an imaging system is directly proportional to the wavelength of the light used for laser cooling. In this context, we demonstrate sub-Doppler laser cooling of 39K using degenerate Raman sideband cooling via the 4S1/2 5P1/2 transition at 404.8 nm in contrast to standard laser cooling techniques which rely on the D2 and D1 transitions, where largely closed transition cycles are available.
High resolution imaging of cold atoms require large optical access, which is often met by transporting atoms into a dedicated vacuum chamber containing in-vacuum optics. We present several approaches and the associated challenges in developing a suitable transport system for our experiment, concluding with the development of a new, moiré lens based, compact and robust setup to optically transport ultracold atoms over long distances.
A description of the ongoing development of a parallel mixing scheme for producing ultracold KCs mixtures, which is designed to significantly simplify the experimental sequence and complexity, is provided in Chapter 5. In addition, in view of the compromised vacuum quality in the glass cell meant for high resolution imaging and breakthrough developments in the field that allow robust control over polar molecules by utilizing electric fields generated using specialized infrastructure, a new experimental chamber is being built. We present the design considerations of the most important aspects of the new setup in Chapter 6.
Finally, a summary of the work done on studying the band structure of the Kagome lattice is presented. This work was carried out during a research stay at the University of California, Berkeley, facilitated by the Doktoratskolleg Atoms, Light, and Molecules at Innsbruck.Govind Unnikrishnan, BS, MSDissertation University of Innsbruck 202
Cooling, transport and mixing of ultracold K and Cs
No full textSeit den frühen 1980er Jahren gibt es Vorschläge, große quantenmechanische Systeme zu untersuchen, die für klassische Computer unzugänglich sind, indem sie direkt über ein anderes gut kontrolliertes Quantensystem simuliert werden. Das Aufkommen von Quantengasexperimenten, die auf bahnbrechenden Fortschritten bei der Laserkühlung und dem Einfangen von Atomen aufbauen, beispielhaft dargestellt durch die erste Realisierung eines quantenentarteten Gases im Jahr 1995, hat danach zu einem ganzen Spektrum experimenteller Bemühungen geführt, um hochgradig kontrollierbare Quantensysteme zu realisieren, die zur Durchführung von Quantensimulationen verwendet werden können. Unter den verschiedenen möglichen Plattformen sind polare Bialkali-Moleküle besonders interessant, da sie über abstimmbare, langreichweitige Dipol-Dipol-Wechselwirkungen interagieren. In Kombination mit kürzlich entwickelten Werkzeugen, die eine ortsaufgelöste Abbildung und Adressierung von gittergebundenen Atomen ermöglichen, stellt ein solches System ein vielseitiges Werkzeug zur Untersuchung verschiedener Quantenphänomene bereit. Diese Dissertation konzentriert sich auf die Realisierung mehrerer wichtiger Schritte zur Realisierung eines solchen Quanten-Toolkits unter Verwendung von K- und Cs-Atomen.
Die hochauflösende Abbildung von Atomen, die in einem Gitter gefangen sind, benutzt das Prinzip der Laserkühlung, um zu verhindern, dass die Atome zwischen Gitterstellen tunneln, während das gestreute Licht aufgesammelt wird. Die Auflösung eines solchen Abbildungssystems ist direkt proportional zur Wellenlänge des für die Laserkühlung verwendeten Lichts. In diesem Zusammenhang demonstrieren wir eine Sub-Doppler-Laserkühlung von 39 K unter Verwendung einer entarteten Raman-Seitenbandkühlung über den 4S1/2 5P1/2-Übergang bei 404,8 nm. Im Gegensatz zu den Standard-Laserkühltechniken, die auf den D2- und D1-Übergängen beruhen, wird hier ein hochangeregtes Niveau in den Kühlzyklus integriert.
Die hochauflösende Abbildung kalter Atome erfordert einen guten optischen Zugang. Es liegt daher nahe, den Ort der Erzeugung des Quantengases und die eigentliche Experimentierkammer räumlich zu trennen. Allerdings braucht es dann einen Transport der ultrakalten Atome. Wir stellen mehrere Ansätze und die damit verbundenen Herausforderungen bei der Entwicklung eines geeigneten Transportsystems für unser Experiment vor und schließen mit der Entwicklung eines neuen, auf Moiré-Linsen basierenden, kompakten und robusten Aufbaus, um ultrakalte Atome optisch über große Entfernungen zu transportieren.
Eine Beschreibung der Weiterentwicklung eines parallelen Mischschemas zur Herstellung ultrakalter K-Cs-Mischungen, das den experimentellen Ablauf und Aufwand deutlich vereinfachen soll, wird nachfolgend diskutiert. Zusätzlich wird die Entwicklung einer neuen Experimentierkammer beschrieben. Eine neue solche Kammer ist erforderlich geworden, da in der bestehenden die Vakuumqualität nicht ausreicht. Gleichzeitig gelingt es damit, die Anforderungen an optischem Zugang und Kontrolle des elektrischen Feldes optimal zu erfüllen.
Abschließend wird eine Zusammenfassung der Arbeiten zur Untersuchung der Bandstruktur des Kagome-Gitters präsentiert. Diese Arbeit wurde während eines Forschungsaufenthalts an der University of California, Berkeley, durchgeführt, der durch das Doktoratskolleg "Atoms, Light, and Molecules" in Innsbruck ermöglicht wurde.Proposals to study large quantum mechanical systems that are intractable to classical computers by directly simulating them via another well controlled quantum system have existed since the early 1980s. The emergence of quantum gas experiments building upon pioneering advances in laser cooling and trapping of atoms, exemplified by the first realization of a quantum degenerate gas in 1995, has thereafter given rise to an entire spectrum of experimental efforts to realize highly controllable quantum systems that can be used to carry out quantum simulations. Among the various possible platforms, bialkali polar molecules are especially interesting since they interact via tuneable, long-range dipole-dipole interactions. Combined with more recently developed tools that allow imaging and addressing of lattice bound atoms in a site resolved manner, such a system provides a versatile toolkit to study various quantum phenomena. This thesis is focused on the realization of several important steps towards the realization of such a quantum toolkit using K and Cs atoms.
High resolution imaging of atoms trapped within a lattice relies on laser cooling to prevent the atoms from tunneling between lattices sites, and collecting the light scattered during this process. The resolution of such an imaging system is directly proportional to the wavelength of the light used for laser cooling. In this context, we demonstrate sub-Doppler laser cooling of 39K using degenerate Raman sideband cooling via the 4S1/2 5P1/2 transition at 404.8 nm in contrast to standard laser cooling techniques which rely on the D2 and D1 transitions, where largely closed transition cycles are available.
High resolution imaging of cold atoms require large optical access, which is often met by transporting atoms into a dedicated vacuum chamber containing in-vacuum optics. We present several approaches and the associated challenges in developing a suitable transport system for our experiment, concluding with the development of a new, moiré lens based, compact and robust setup to optically transport ultracold atoms over long distances.
A description of the ongoing development of a parallel mixing scheme for producing ultracold KCs mixtures, which is designed to significantly simplify the experimental sequence and complexity, is provided in Chapter 5. In addition, in view of the compromised vacuum quality in the glass cell meant for high resolution imaging and breakthrough developments in the field that allow robust control over polar molecules by utilizing electric fields generated using specialized infrastructure, a new experimental chamber is being built. We present the design considerations of the most important aspects of the new setup in Chapter 6.
Finally, a summary of the work done on studying the band structure of the Kagome lattice is presented. This work was carried out during a research stay at the University of California, Berkeley, facilitated by the Doktoratskolleg Atoms, Light, and Molecules at Innsbruck.Govind Unnikrishnan, BS, MSDissertation University of Innsbruck 202
Scientometric Insights into Research Contributions of Govind Ballabh Pant University of Agriculture and Technology
No full textThis study evaluates the research productivity and impact of Govind Ballabh Pant University of Agriculture and Technology using Scopus data (2001–2021). A total of 4,897 publications receiving 53,059 citations were analyzed with scientometric indicators including AGR, RGR, DT, collaboration measures, authorship, citations, and keywords. Results show a gradual growth in research output, with peak productivity during 2017–2021 and Kumar, A. as the most prolific author (165 publications)
Colloidal engines for innovative tests of information thermodynamics
No full textRecent theoretical developments in information thermodynamics elucidated the link between the acquired information and the entropy production through measurement and feedback control by generalizing the fluctuation theorems and the second law of thermodynamics. We summarize here our recent experimental studies based on the colloidal system that have been conducted to test the theoretical findings of information thermodynamics. In particular, we present the design principles of error-free and noisy information engines consisting of a colloidal particle in an optical trap that is capable of performing nearly error-free measurement and ultrafast feedback control. Our perspectives on future experimental studies are also presented. ?? 2020 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group
Review on Vaidyaka Paribhasha Pradipa- A Comprehensive Treatise of Indian Pharmaceuticals by Govind Sen
No full textVaidyaka Paribhasha Pradipa was written by Govind Sen, son of Krishna Vallabh Sen. Vidyotini Hindi Tika was written by Indradev Tripathi. The book Vaidyaka Paribhasha Pradipa consists of almost all references collected from various Samhitas regarding the fundamental principles and different Ayurvedic herbal pharmaceutical preparations and descriptions on Panchakarma. The whole content of the book is divided into 4 Khandas. Prathama khanda deals with Mana paribhasha, Dravya samgrahana vidhi, and shelf life of different Kalpana etc. Dwitiya khanda deals with Panchavidha kashaya kalpana and its Upakalpana and dose. Tritiya khanda deals with Sneha kalpana, Sandhana kalpana and Paribhasha of different Gana. Chaturtha khanda deals with Panchakarma procedures and Sneha murchana. The present book review mainly focuses to highlight the framework of Vaidyaka Paribhasha Pradipa, provides information about the author, details of 4 Khandas, a special contribution to the field of pharmaceutical science by the author. Thus, Vaidyaka Paribhasha Pradipa, the compilation book on Bhaishajya Kalpana is a very essential and mandatory book for those who aspire to gain basic, clear, and thorough knowledge in Ayurvedic pharmaceuticals. It is one of the indispensable reference books. The present book is designed to help the young practitioners who prepare medicines and graduates and post-graduate scholars get a clear idea of medicine preparation
Study of Numerical Solutions for the Deformations of A Bourdon Tube
No full textTitle: Study of Numerical Solutions for the Deformations of A Bourdon Tube, Author: Govind Prashad, Location: ThodeThe objective of this study is to compute numerically the deformations on an elliptical cross-sectional bourdon tube by solving the partial differential equations as presented
by Lee [Reference 12]. The partial differential equations and boundary conditions are reduced to a set of simultaneous linear equations by approximating partial derivatives to the corresponding difference quotients sing finite difference techniques. The next step involves the solution of this set of linear equations. The direct method of inverting the matrix was not possible to the memory limitations of the computer. Therefore, a block iteration technique was used, but it was found that convergence was not possible. The next method evolved was that of double iteration. for this method a convergence test was applied which indicated that convergence was possible, but the rate of convergence was very low. It is not practical to use this method, unless the convergence rate is improved. At the present no method is available to improve the convergence rate effectively. Therefore the study concludes with suggestions that either the convergence rate should be improved by evoking new methods or an entirely new formulation of the problem should be made.ThesisMaster of Engineering (ME
UniSQ Open Access Week 2025
No full textThis event will delve into the experiences of returning and new authors. The session will explore the the authors' journey through the book creation process, and the benefits, including the extension of their academic and professional reach.
Returning authors, Drs Anna Chruscik and Louisa Windus initially adapted an Open Stax textbook to create 'Fundamentals of Anatomy and Physiology'. They have embarked on a new project; a six volume set entitled 'Biosciences for the Health Professionals', the first of which has already been published.
New author Dr Chris Kossen was inspired to create his book 'Microlearning - Engaging Learning Experiences Made Easy' based on research and practice leading to a national teaching award. Since publication, Dr Kossen has attracted international collaboration, and research dissemination opportunities.
Dr Govind Krishnamoorthy has just finished a third volume dealing with Trauma Informed Practice, titled ‘Recovery and Resilience at School’ written with Dr Kay Ayre (University of Western Australia) and Dr Dayna Schimke University of Southern Queensland). This text provides interest as it converted an existing podcast series into a textbook, and provides diverse, authentic, and international practitioner perspectives.
The authors will share practical insights on open publishing and provide reflections on how this has enhanced their academic and research profiles
Diagnostic Utility of Immunohistochemistry Markers Galectin-3, CK19 and CD56 in Thyroid Neoplasms: A Descriptive Study
No full textIntroduction: The spectrum of follicular patterned thyroid lesions vary from benign to malignant, their categorisation based solely on morphology can often be equivocal. Diagnostic value of immunohistochemistry as a useful ancillary technique is researched in detail, but there is no consensus for use of a marker of diagnostic utility in differentiated thyroid carcinoma.
Aim: To evaluate the differential immunohistochemical expression of galectin-3, CK19 and CD56 in benign and malignant thyroid neoplasms.
Materials and Methods: The present descriptive cross-sectional study was carried out in the Department of Pathology of a tertiary care centre, Government Medical College, Ernakulam, Kerala, India, from January 2018 to January 2019. Immunohistochemistry staining of galectin-3, Cytokeratin 19 (CK19) and Cluster Differentiation 56 (CD56) was done in 47 thyroid neoplasms. Cytoplasmic and nuclear staining of galectin-3, cytoplasmic or membranous staining of CK19 and loss of membranous expression of CD56 in more than 10% neoplastic cells were taken as positive expression. The data was analysed using IBM Statistical Package for the Social Sciences (SPSS) software version 22.0. Diagnostic test evaluation for markers done by calculating sensitivity and specificity.
Results: Out of total 47 neoplasms, 26 were malignant and 21 were benign neoplasms. Of these, galectin-3 positivity was seen in 22 (84.61%) malignant neoplasms and in 2 (9.52%) benign neoplasms. Cytokeratin 19 positivity was seen in 26 (100%) malignant neoplasms and in 7 (33.33%) benign neoplasms. Loss of CD56 expression was observed in 24 (92.3%) malignant neoplasms and in 4 (19.04%) benign neoplasms. Considering histopathology as the gold standard, the sensitivity for detecting malignancy for the 3 markers, galectin-3, CK19 and CD56 was 84.62%, 100%, 92.3% and specificity was 90.48%, 66.67%, 80.95%, respectively. The diagnostic accuracy of galectin-3, CK19 and CD56 was 92.3%, 80.95%, 87.23%, respectively. Diagnostic Odd’s ratio for Galectin-3 was 2.3% in the present study.
Conclusion: Galectin-3 was found to be a reliable marker for thyroid papillary carcinoma and for differentiating malignancy. The panel consisting of galectin-3 and CD56, is valuable and complementary when used in two marker combination. CK19 was found to be the least specific diagnostic marker of thyroid malignancy
Sub-Doppler laser cooling of K via the 4S5P transition
No full textWe demonstrate sub-Doppler laser cooling of K using degenerate Raman
sideband cooling via the 4S5P transition at
404.8 nm. By using an optical lattice in combination with a magnetic field and
optical pumping beams, we obtain a spin-polarized sample of up to atoms cooled down to a sub-Doppler temperature of 4 K, reaching a
peak density of atoms/cm, a phase-space density
greater than , and an average vibrational level of in the lattice. This work opens up the possibility of
implementing a single-site imaging scheme in a far-detuned optical lattice
utilizing shorter wavelength transitions in alkali atoms, thus allowing
improved spatial resolution
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