10,733 research outputs found
Dinesh Singhal oral history interview and transcript
No full textThis recording and transcript form part of a collection of oral history interviews conducted by the Chao Center for Asian Studies at Rice University. This collection includes audio recordings and transcripts of interviews with Asian Americans native to or living in Houston.Dinesh Singhal was born in Morar, a small town in Madhya Pradesh India. After attending a boarding school from 4th to 12th grades,, he went to Ramjas College in Delhi, eventually earning an LLB (law) degree from Delhi University. Initially venturing into the United States on a whim to take a summer course, Mr. Singhal experienced a turbulent 12-year journey of seeking employment, higher education, studying for the LSAT/bar exam, and searching for legal immigration status. Attending the University of Houston’s law school, Mr. Singhal earned his JD and eventually settled in Houston with his law practice in litigation as a trial attorney. He is actively involved in various movements around Houston, both politically and socioculturally and currently lives with his wife and two children in River Oaks
A Second-Order Observation of Organizational Deviance
No full textIn this chapter, Andrea Fried and Arvind Singhal highlight which novel research questions break ground when taking a second-order perspective on organizational deviance. The concept of the ‘second-order observer’ for researchers leaves the assessment of organizational deviance explicitly to the empirical field, and brings organizations and their members as describers, as assessors, and as sanctioners of organizational deviance into the discussion. The chapter strengthens social agency in deviations from standards to counteract the view that deviants are a ‘passive non-entity’. Fried and Singhal describe how organizational deviance has three dimensions and can analytically be distinguished as a descriptive, a normative, and a sanctioning aspect. The chapter concludes with six assignments for developing a concept of organizational deviance.</p
A new summation identity for the Srivastava–Singhal polynomials
No full textAbstractIn his recent investigations involving differential operators for some generalizations of the classical Laguerre polynomials, H. Bavinck [J. Phys. A Math. Gen. 29 (1996) L277–L279] encountered and proved a certain summation identity for the classical Laguerre polynomials. The main object of this sequel to Bavinck's work is to prove a generalization of this summation identity for the Srivastava–Singhal polynomials. The demonstration, which is presented here in the general case, differs markedly from the earlier proof given for the known special case. It is also indicated how the general summation identity can be applied to derive the corresponding result for one class of the Konhauser biorthogonal polynomials
Assessment of left ventricular function by noninvasive methods
No full textA review of the noninvasive methods to assess left ventricular functio
Xanthelasma palpebrarum – a brief review
No full textPragya A Nair, Rochit Singhal Department of Dermatology, Venereology and Leprosy, Pramukhswami Medical College, Gujarat, India Abstract: Xanthelasma palpebrarum is the most common cutaneous xanthoma, characterized by yellowish plaques over eyelids – most commonly, over the inner canthus of the upper lid. It is triggered by hyperlipidemia, thyroid dysfunction, and diabetes mellitus. Xanthelasma results from perivascular infiltration of mono- and multinucleated foam cells within lipid-laden cytoplasmic vacuoles in the superficial reticular dermis. Different modalities of treatment, such as simple surgical excision, cryotherapy, chemical peeling with trichloroacetic acid, radiofrequency, and laser, are used in the treatment of xanthelasma palpebrarum. A brief review of current treatment strategies is presented here. Keywords: xanthelasma palpebrarum, xanthoma, hyperlipidemia, laser, cryotherap
A study of enzyme monolayers immobilised on electrode surfaces
No full textThe enzyme glucose oxidase (GOx) was used throughout this study. An investigation into the electrostatic interactions of GOx with polycatonic redox polymers was conducted. It was shown that GOx forms an electrostatic complex with an osmium redox polymer which strongly absorbs to a glassy carbon electrode. Control of the solution pH and ionic strength allowed the stability and magnitude of the catalytic response to be optimised. It was demonstrated that monolayer deposition results in a larger catalytic response with respect to the amount of immobilised material when compared with other techniques employing similar materials. A more complex structure was constructed on thiol modified gold. Monolayers of GOx and a ferrocene redox polymer were alternately deposited and immobilised through electrostatic attraction. The catalytic response and number of ferrocence sites present increased with the number of layers deposited. GOx has a stabilising effect on the oxidised forms of the redox polymer sites but overall decreases the rate of charge transfer within the film.The scanning electrochemical microscope (SECM) was found to be an effective means of imaging enzyme modified surfaces. A monolayer of GOx was immobilised in poly(phenol) on Pt and variations in the activity of GOx in the presence of glucose studied. It was shown that through the detection of hydrogen peroxide, oxygen or other solution mediator, such as ferrocene monocarboxylic acid, variations in GOx activity were detectable over the surface. From the images obtained it was concluded that a significant proportion of GOx is immobilised with the active site uncovered above the poly(phenol) film.A brief study of aspartic acid derivatives of tetrathiafulvalene (TTF) suggests that the attachment of an amino acid to TTF does not affect the overall electrochemical characteristics. The formation of oligomeric units results in unusual variations in the voltammetry when compared to that of unmodified TTF, this may be attributed to the occurrence of a reorganisation step of the larger oligomers after the first oxidation step.</p
A new framework of optimizing keyword weights in text categorization and record querying
No full textIn text mining research, the Vector Space Model (VSM) has been commonly used to represent text documents as a vector where each component is associated with a particular word in the documents. Assigning appropriate keyword weights in VSM has been critical in Information Retrieval (IR) and Text Categorization (TC).
Traditionally keyword weighting processes are unsupervised; that is, the knowledge of document's category is not leveraged to label the documents. Typically, each keyword weight is assigned using the term frequency -- inverse document frequency (TFIDF) measure. Although the TFIDF measure has been proven effective in several text mining problems, it might not give the optimal classification power for IR and TC. In this thesis, we propose a new optimization framework to find the best keyword weights based on the proposed inter-class and intra-class similarity concept.
The optimal keyword weight can be viewed as the feature space projection where documents from the same category are best clustered together and separated from other categories. Subsequently, the category average (centroid) classification is employed to categorize text documents. The proposed approach is tested on two practical applications: record query and text categorization. The record query application is slightly different from traditional IR problems as the goal is to find correlated (duplicate and master) text records. This problem was initiated by a telecommunication company where service engineers attempt to look for associations of the current defect problem in previously recorded problems in the database. Extensive experiments demonstrate that the proposed framework significantly improves the classification accuracy and provides balanced performance as measured on all text categories when compared to the standard TFIDF search. The text categorization application is tested on the Reuters news data set which is a gold-standard benchmark data set. The results show that our framework improves performance for the two applications considered, namely Information Retrieval and Text Categorization.M.S.Includes bibliographical references (p. 80-83)
On the double presystolic wave of the jugular tracing
No full textDescription of the clinical meaning of the double presystolic wave of the jugular tracin
Age estimation by teeth :a tooth can divulge anyone's age!
No full textForensic science refers to areas of endeavour that can be used in a judicial setting and accepted by the court and the general scientific community to separate truth from untruth, and Forensic Odontology is a part of this endeavour. The oral cavity is “where it all begins from!”. The human dentition can provide much information about the identification of an individual both in life and after death. The estimation of age at the time of death is an important step in the identification of human remains. If this age can be accurately estimated, it will significantly narrow the field of possible identities that will have to be compared to the remains in order to establish a positive identification. To achieve this there are many methods available to the forensic dentist, anthropologist and pathologist. Some of the more accurate methods of age estimation in the juvenile and younger adult, have been based on the assessment of the degree of dental development as it relates to chronological age. The aim of this book is to explore the various methods of estimating chronological age from the degree of dental development till the time of death
Noninvasive index of cardiac contractility during stress testing: A collaborative study
No full textThe present study was conducted in parallel in three different institutions with a similar purpose but using different technical setups. Based on the experimental demonstration that the external phonocardiogram is similar to the rate of acceleration (d3P/d3t) of the left ventricular pressure, and that catecholamines in a similar way increase the early positive wave of the left ventricular pressure and the first heart sound (S1) of the external phonocardiogram; knowing that exercise causes secretion of catecholamines and sympathetic reflexes, we have studied the S1 changes as a result of exertion in 34 normal young subjects. Blood pressure, heart rate, electrocardiograph, and phonocardiograph recordings of each subject were taken. In 10 subjects, cardiac output was also recorded by impedance cardiography. The result of the study was that the first heart sound increased routinely 4-5 times the normal amplitude; in a few subjects the increase was up to 15 times greater. While the extent of increase of S1 was proportional to the severity and duration of the effort and was usually proportional to the increase of other parameters, exceptions were noted as having marked increase of S1 with moderate increase of either blood pressure or heart rate. This was explained by the different receptors activated by the catecholamines and by the complexity of hormonal and neural influences acting on various organs in a stress test. The amplitude of S1 was found to be a reasonably reliable index for following changes of cardiac contractility during exercise, and the suggestion was made that this parameter should be studied in parallel with the others in routine stress tests
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