Numerical Investigation on Gas Bubbling Assisted Inclusion Transport and Removal in Multistrand Tundish

Vipul Kumar Gupta,Pradeep Kumar Jha,Pramod Kumar Jain 대한금속·재료학회 2022 METALS AND MATERIALS International Vol.28 No.9

In continuous casting, the molten metal quality in the mold is affected by flow pattern, temperature distribution and inclusiontransport in the multistrand tundish. Natural convection due to thermal buoyancy directly influences these parameters andwith gas bubbling, further improvisation can be made. In the present work, numerical investigation of the effect of thermalbuoyancy is carried out to examine the flow field, temperature distribution and inclusion trajectories. Further, gas bubblingcurtain modeling using the Euler-Euler approach is performed for the different locations on the bottom wall of the tundishand quantitative analysis of tundish performance is presented using residence time distribution (RTD) curves. The resultsshow that big circulation loop generated due to thermal buoyancy assists in inclusion removal and mixing at each outlet. Gas bubbling increases the molten metal flow velocity in the central region of tundish, leading to a decrease in the dimensionlessnumber Gr/Re2 near the outlets which are far away from the inlet of the tundish i.e. outlet 2 and outlet 3. Hence, thedominance of natural convection decreases. The inclusion removal rate is found to increase significantly as the circulationloop formed at each side of the curtain forces them upward direction. However, the reported inclusion removal rate in gasbubbling cases is found to be independent of particle size and curtain location.

Estimating Total Factor Productivity and Its components - Evidence from Manufacturing Sector of Tamilnadu, India

Kumar,T. Sampath,Pradeep V. 한국유통과학회 2019 KODISA ICBE (International Conference on Business Vol.2019 No.-

The study applied Data Envelopment Analysis (DEA) to estimate total factor productivity growth and to identify the sources of productivity growth in the manufacturing sector of Tamil Nadu. The study considered 12 major sectors and estimated productivity growth and the major sources of productivity growth during the period 1981-82 to 2007-08. The study found that the productivity growth in the industrial sector of Tamil Nadu at the aggregate level during the test period was almost nil. While it is the case at the aggregate level, there are mixed results at the sectoral level. During the pre-reform period, there was significantly higher productivity growth in almost all the sectors contributed mainly by the improvements in efficiency. On other hand, there was productivity deterioration in the post-reform period since almost all the sectors witnessed negative productivity growth despite a technical change in the post-reform period. The study based on the empirical findings suggests that there will be productivity growth only if any improvement in the technology is accompanied by the corresponding improvement in the efficiency with which the technology can be turned into productivity gains. A well developed and skilled labour force along with the improvements in the technological developments will lead to higher productivity growth in the manufacturing sector both at the aggregate and sectoral level.

Assessment of the quality of life in maxillectomy patients : a longitudinal study

Pradeep Kumar,Habib Ahmad Alvi,Jitendra Rao,Balendra Pratap Singh,Sunit Kumar Jurel,Lakshya Kumar,Himanshi Aggarwal 대한치과보철학회 2013 The Journal of Advanced Prosthodontics Vol.5 No.1

PURPOSE. To longitudinally assess the quality of life in maxillectomy patients rehabilitated with obturator prosthesis. MATERIALS AND METHODS. Thirty-six subjects were enrolled in the span of 16 months, out of which six were dropouts. Subjects (age group 20-60 years) with maxillary defects, irrespective of the cause, planned for definite obturator prosthesis, were recruited. The Hindi version of European Organization for Research and Treatment of Cancer, Head and Neck version 1 of Quality of Life Questionnaire was used before surgical intervention and one month after definitive obturator. Questionnaire includes 35 questions related to the patient’ physical health, well being, psychological status, social relation and environmental conditions. The data were processed with statistical package for social science (SPSS). Probability level of P<.05 was considered statistically significant. RESULTS. The quality of life after rehabilitation with obturator prosthesis was 81.48% (±13.64) on average. On item-level, maximum mean scores were obtained for items problem with teeth (1.87 ± 0.94), pain in mouth (1.80 ± 0.92), trouble in eating (1.70 ± 0.88), trouble in talking to other people (1.60 ± 1.22), problems in swallowing solid food (1.57 ± 1.22) and bothering appearance (1.53 ± 1.04); while minimum scores were obtained for the items coughing (1.17 ± 0.38), hoarseness of voice (1.17 ± 0.53), painful throat (1.13 ± 0.43), trouble in having social contacts with friends (1.10 ± 0.40) and trouble having physical contacts with family or friends (1.10 ± 0.31). CONCLUSION. Obturator prosthesis is a highly positive and non-invasive approach to improve the quality of life of patients with maxillectomy defects.

The linguistic prerequisites and grammaticalization of ‘compound verb’ in Hindi

Pradeep Kumar Das 한국외국어대학교 인도연구소 2015 남아시아연구 Vol.21 No.2

The present paper is an attempt to understand the complex structure of compound verb construction (CV henceforth) and the linguistic prerequisites of CV in Hindi. In doing so, I have divided this research paper in three sections. Section one establishes the linguistic prerequisites and the philosophical basis under which two or more lexical items come to get syncretized both semantically and morphologically to form a new category of grammar that we know as ‘compound verb’. It establishes the semantic, morphological and syntactic prerequisites of CV. Section two discusses one of the salient features i.e. the process of grammaticalization of linguistic elements in the formations of CV and talks about the degree of grammaticalizations. The third section investigates the types of the compound verb construction and their linguistic properties in Hindi. This helps to end the paper with a conclusion as to what should and should not be called the compound verb in Hindi.

REVERSED COMPOUND VERB IN HINDI

Pradeep Kumar Das 한국외국어대학교 인도연구소 2016 남아시아연구 Vol.22 No.1

The phenomenon called ‘Reversed compound-verbs’ (RVCs hereafter) has very much been noticed by Hook (1974; 55). He highlights the ‘confusions’ that such RCVs bring for the analysis of this category of compound verbs in Hindi. He has been able to list some of the pairs of ‘polar’ and ‘vector’ verbs that can be reordered in Hindi and many other Indian languages, but there is no explanation that is available for such reordering in Hook(ibid). The present paper is an effort to examine the process of the formation of these ‘Reversible Compound Verbs’ (RCVs hereafter) and analyze the function of the RCVs by using the yardstick adopted in Das (2006, 2013 and 2015). It would be interesting to examine what happens to the morphological, semantic and syntactic requirements of the CVs when they are compared with that of the RCVs. What is the semantic context in which the reordering of some CVs is grammatical and acceptable but others turn out to be ungrammatical and thus not allowed for reversing or reordering. It would give us a chance to evaluate the hypothesis proposed in Das (1997, 2015) that the ± transitivity of the V2 decides the ± transitivity of the entire CV in Hindi and other languages. There are some linguistic principles that dominate when and how CVs can be reversed. It is interesting to examine the so-called ‘reversed compound verbs’ in Hindi as it involves the pragmatic factors such as stylistic effect, suddenness, directionality, intentionality and the uncontrollable actions as the linguistic parameters which need a great deal of explanation. The present paper in an effort to take up these issues that are involved in reversing, reshuffling or reordering of the ‘compound verbs’ in Hindi and this should be empirically explained and typologically verified in other Indian languages.

Identification and characterization of the promoter of a gene expressing mainly in the tapetum tissue of cotton (Gossypium hirsutum L.)

Kumar Paritosh,Amarjeet Kumar Singh,Amita Kush Mehrotra,Deepak Pental,Pradeep Kumar Burma 한국식물생명공학회 2018 Plant biotechnology reports Vol.12 No.6

Anther and tapetum-specific genes are important for understanding male gametophyte development, as well as for their use in the development of barnase/barstar-gene based male sterility and restorer system for hybrid seed production. An essential component of the system is the availability of tapetum-specific promoters. In the present study, anther-specific genes were identified in cotton using microarray-based differential expression analysis, some of which show expression specific to the anthers at a stage where tapetum tissue was fully developed. Validation of the identified genes using RT-PCR and in situ hybridization identified one novel gene (AEG—Anther Expressing Gene) encoding a putative lipid binding protein as having a tapetum-specific expression. Further, three paralogs of the gene were identified in the cotton genome out of which the gene AEG1 (Anther Expressing Gene1) was found to express in the tapetum layer. Analysis of transgenic plants developed in cotton using 1.5 Kb promoter region of the of AEG1 gene fused upstream to the reporter gene β-glucuronidase revealed a broad window of expression of the AEG1 promoter in the tapetum tissue from the tetrad stage of anthers till the degeneration of the tapetum cells. Low levels of expression were also observed in the root tissues. Expression was not observed in the stem and leaves. The broad window of expression of AEG1 promoter in the tapetum tissue makes it a suitable candidate for the expression of the barstar gene for effective fertility restoration in the barnase/barstar system.

The Form and Function of Conjunct Verb Construction in Hindi

Pradeep Kumar Das 한국외국어대학교 인도연구소 2009 남아시아연구 Vol.15 No.1

The present paper examines the form and function of one of the complex predicates that is known as Conjunct verb construction in Hindi. The conjunct verb is a kind of predicate that is formed with either a noun or an adjective and a verb (the light verb). The conjunct verbs that are formed with an adjective and a verb do not pose any problem for the theoreticians. However, the function of the conjunct verb that has a noun and verb is descriptively and theoretically puzzling. The nominal host which comes to form a complex predicate with the light verb has two functions. In one, it not only helps the verb to become complex, but also controls agreement when other noun phrases are overtly case marked, but in other case, it just remains passively in the verb phrase and even when it is the only noun phrase with no overt case marking, it does not show any agreement with the verb. The paper presents this puzzling behaviour of the conjunct verb and its nominal host in two sets A and B respectively and finally evokes the case theory of Chomsky and Panini to give a solution of the problem. The solution is of course a hypothesis but it seems to have explanatory power for the conjunct verb construction.

Some Desmids from Garhwal Region of Uttarakhand, India

Pradeep Kumar Misra,Madhulika Shukla and Jai Prakash,Purnima Misra 한국조류학회I 2008 ALGAE Vol.23 No.3

The present paper consists of 42 taxa belonging to 7 genera of desmids (green algae) collected from two districts of Garhwal region of Uttarakhand (Western Himalayas). The district Haridwar is located 29° 55’ to 29° 59’ N latitude and 68° 5’ to 68° 30’ E longitude covering about 2360 km2 area and Dehradun district is situated between 77°34’ to 78° 18’ E longitude and 29° 58’ to 30° 58’ N latitude. Seven genera of desmids are (with number of taxa in parenthesis): Closterium Nitzsch. (9), Cosmarium Corda ex Ralfs (25), Euastrum Ehr. (2), Spondylosium Breb. (1), Micrasterias Ag. (1), Staurastrum Meyen (3), Arthrodesmus Ehr. (1). All these taxa constitute new records for the area. The algal localities are relatively cleaner than those of majority of urban areas. A rich assemblage of desmids shows that water bodies of these hilly areas are still undisturbed and need protection for preservation of algal biodiversity.

Status of adsorptive removal of dye from textile industry effluent

Kumar, Pradeep,Agnihotri, Ruchika,Wasewar, Kailas L.,Uslu, Hasan,Yoo, ChangKyoo Informa UK (Taylor Francis) 2012 Desalination and water treatment Vol.50 No.1

Endoscopic Ultrasound-Guided Random Omental Fine Needle Aspiration: A Novel Technique for the Diagnosis of Peritoneal Carcinomatosis

Pradeep Kumar Siddappa,Neha Jain,Naveen K. Agarwal,Monika Jain,Gurwant Singh Lamba 대한소화기내시경학회 2020 Clinical Endoscopy Vol.53 No.5

Background/Aims: Diagnostic abdominal paracentesis has been described in literature to have variable sensitivity of 50%–75% forthe detection of peritoneal carcinomatosis (PC). We believe that random needle aspirates from the omentum, even in the absence ofobvious deposits by endoscopic ultrasound (EUS), could prove malignancy in patients with PC. Methods: Consecutive patients who underwent EUS for diagnosis and staging of cancer and found to have ascites were includedafter obtaining informed consent. EUS-guided fine needle aspiration (EUS-FNA) from random sites in the omentum was performedthrough the transgastric route using a linear echoendoscope. Results: Fifty-four patients underwent EUS during October 2015 to April 2017 for detection, staging, or FNA of a suspectedmalignant lesion. Ascites was seen in 17 patients and 15 patients who fulfilled the criteria were included. The procedure wassuccessful in all patients. Cytology was suggestive of malignancy in 12 (80%) but not suggestive of malignancy in 3 (20%) patients. Three patients who tested negative had hyperbilirubinemia with biliary obstruction. Their ascitic fluid analysis result was alsonegative. Conclusions: Random FNA of the omentum in patients with malignancy-related ascites is highly effective in the diagnosis of PC andcould be employed during EUS evaluation of malignancies.