1,359,157 research outputs found
Three novel F8 mutations in sporadic haemophilia A cases
No full textLetter to the editorRashid Hussain, Noman Bin Abid, Sajjad Hussain, Zeeshan Shaukat, Mudassir Altaf, Sara Altaf, and Gulzar Niaz
Urdu biography and Altaf Husayn Hali
No full textURL: http://sefad.selcuk.edu.tr/sefad/article/view/512Edebi sermayesini Arapça ve Farsçadan alan Urdu Dili'nin ilk dönem edebi örneklerine baktığımızda bu ürünlerin tür açısından biyografik olduğu görülür. Nitekim Hind Yarımadası'nda da her türlü biyografik eser yeterli sayıda yazılmıştır. Bu çalışmada biyografi yazarlığının Hind Yarımadası 'ndaki tarihi gelişimi an/atıldıktan sonra Altaf Hüseyin Heılf'nin bu alandaki çalışmalarına değinilmiştir.When we looked at the patterns of the early period of Urdu literature which took literary materials from Arabic and Persian, we see that these are biographical samples. Therefore a /ot of biographical Works had been written in Sub-Continent. The present article is about the historical progress of the biography in the nineteenth century in lndia. A part from it this study deals with Altaf Husayn Ha/f and his biographical Works on this topic
A chemical kinetics-based approach to predict uncontrolled self-ignitions in Hydrogen Internal Combustion Engines
No full textThe primary objective of the present work is to correlate the hydrogen explosive characteristics with internal combustion engine design parameters, particularly the engine compression ratio. An approach that couples the knowledge about H2 chemical behaviour, and the in-cylinder charge thermodynamic state, has been conceptualized in the form of a unified plot to visually inspect the likelihood of an auto-ignition event. The plot cautions the possible occurrence of autoignition if the state of the charge inside the engine cylinder reaches thermodynamic conditions beyond the explosion limit curve. Having at hand such a tool enables one to cautiously design future experiments to prevent possible damage because of extreme stresses due to an undesired autoignition event.
The results of the analyses in the present work have translated into defining a maximum limit on the compression ratio that can be proposed at pre-defined intake thermodynamic state, mixture composition, engine geometry and engine speed. Predictions based on recently developed chemical mechanisms were employed for the analyses, exploiting the well-established knowledge about the chemical kinetics of hydrogen oxidation.
Thus, zero-dimensional numerical simulations were performed. Such an approach avoids also the limitations associated with experimental procedures. To evaluate the maximum safe compression ratio, both a static and a time-based approach have been employed to study the vicinity of a thermodynamic state to the autoignition limit i.e., the explosion limit of hydrogen. Three possible criteria for the definition of a maximum safe geometrical compression ratio were developed and analysed. The present work has then been finally ensembled in the form of an empirical correlation involving intake pressure, intake temperature and equivalence ratio as the variables.
Furthermore lubricant oil as a contaminant seeping through the compression rings of a piston in an internal combustion engine, is modelled to evaluate the distribution of mass and temperature inside a droplet of n-hexadecane using 0D- simulations to evaluate the variation of ignition delay time within the droplet in gas-phase and its effect on the local concentration diluting the pure hydrogen in the vicinity and hence increasing the reactivity causing an early source of self- ignition.
A final study concerning developing detonations from hot spots is carried out to understand the effect of a temperature gradient other than ‘linear’ within the hot spot that could change the detonation response diagrams and subsequently the modes of reacting front propagation. Such detonations with high peak pressures are detrimental to components inside an internal combustion engine and therefore the need to study any possibility of its occurrence is crucial to a better understanding of the design
Altaf Fatima and children\u27s literature: Altaf Fatima and children\u27s literature
No full textChildren are the basic building block and integral part of the society. Like children, their literature is also important. Its impact on children in various contexts cannot be ignored. Altaf Fatima started writing stories with "Afsana" but she was also concerned about the young builders of the nation which drew her attention to writing children\u27s stories. She kept two main principles in mind while writing children\u27s literature. One is a deep look at the psychology of children and the other is the simplest language۔
 
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Linkage between gold and the stock market in India
No full textIndia is one of the biggest consumers of gold on the planet. Nufazil Altaf Ahangar shows that gold has been a better safe-haven asset for investors in the country in times of crisis than stocks and shares. He argues, therefore, that policy-makers should take steps to create a more efficient gold market in India
Pandemic problems: the disconnect between stock markets and consumer sentiment in Covid-19 India
No full textStock market and consumer sentiment indices used to be co-occurrent indicators, but since the outbreak of COVID-19 we have witnessed a disconnect between these two indices in many countries of the world, including India. Nufazil Altaf and Farooq Shah examine the reasons for the emergence of this disconnect between stock market and consumer sentiment indices in India
Modification of mesoporous silicas
No full textMesoporous silicas were post-synthetically modified with organometallic complexes in order to produce well defined supported meal centres.The first part of this thesis describes the synthesis of mesoporous silicas MCM-41(A), MCM-41(B) and A1MCM-41 using surfactant templates, MESLC using liquid crystal templates and KMES from an aged gel mixture. The mesoporous materials were characterised by a combination of methods (PXRD, IR spectrometry, MAS NMR, TEM and BET surface area measurements) which resulted in the identification of porous silicas with a hexagonal lattice of pores of 22 - 36 Å and internal surface areas of 848 - 1646 m2g-1. The second part of this thesis describes the post-synthetic modification of mesoporous silicas with the organometallic species trimethylgallium, diethylzinc, Pd(allyl)cp, Pd(CH3CN)2(NO2)Cl and Pd(PPh3)3. MCM-41(A) was modified with trimethylgallium in a direct and indirect vapour phase reaction. MCM-41(B), KMES and MESLC were modified with trimethylgallium via vapour phase reactions. The interaction of trimethylgallium with mesoporous silicas was monitored by EXAFS and led to the loss of one methyl group and surface attachment of diemthylgallium via two silanol groups for MCM-41(A) at 100°C, and MCM-41(B) and KMES at 200°C, and via two silanol groups for MESLC at 200°C. The modification of MCM-41(A), MCM-41(B), KMES and MESLC by diethylzinc resulted in the loss of one ethyl group and interaction of the monoethylzinc species with the silica surface via three silanol groups for MCM-41(A), MCM-41(B) and KMES, and via two silanol groups for MESLC.MCM-41(A), KMES AND MESLC were modified by Pd(allyl)cp leading to the formation of Pd-cp subunits attached to the silica surface via two silanol groups for MCM-41(A) and KMES, and via one silanol group for MESLC. MCM-41(A) was also modified with Pd(CH3CN)2(NO2)Cl leading to the loss of two acetonitrile groups and the anchoring of a Pd(NO2)Cl subunit to the surface of the silica via two silanol groups.</p
Variations on the Author
No full text“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
No full textWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
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