检索结果-南通市图书馆

Investigation of proton structure function F_(2)^(p)at HERA in light of an analytical solution to the Balitsky–Kovchegov equation

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2024年第3期76卷 120-126页

作者： Ranjan Saikia Pragyan Phukan Jayanta kumar sarma HEP laboratory Department of PhysicsTezpur UniversityTezpurAssam-784028India Department of Physics Moran CollegeMoranhatAssam-785670India

In this paper,the proton structure function F_(2)^(p)(x,Q^(2))at small-x is investigated using an analytical solution to the Balitsky–Kovchegov(BK)*** the context of the color dipole description of deep inelastic scattering(DIS),the structure function F_(2)^(p)(x,Q^(2))is computed by applying the analytical expression for the scattering amplitude N(k,Y)derived from the BK *** transverse momentum k and total rapidity Y,the scattering amplitude N(k,Y)represents the propagation of the quark-antiquark dipole in the color dipole description of *** the BK solution we extracted the integrated gluon density xg(x,Q^(2))and then compared our theoretical estimation with the LHAPDF global data fits,NNPDF3.1sx and ***,we have investigated the behavior of F_(2)^(p)(x,Q^(2))in the kinematic region of 10^(-5)≤x≤10^(-2)and 2.5 GeV^(2)≤Q^(2)≤60 GeV^(2).Our predicted results for F_(2)^(p)(x,Q^(2))within the specified kinematic region are in good agreement with the recent high-precision data for F_(2)^(p)(x,Q^(2))from HERA(H1 Collaboration)and the LHAPDF global parametrization group NNPDF3.1sx.

关键词： quantum chromodynamics(QCD) perturbative QCD(pQCD) proton structure function small-x Balitsky-Kovchegov equation

Small x phenomenology on gluon evolution through the BFKL equation in light of a constraint in multi-Regge kinematics

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2020年第2期72卷 50-59页

作者： Pragyan Phukan Madhurjya Lalung Jayanta kumar sarma HEP laboratory Department of PhysicsTezpur UniversityIndia

We investigate the impact of so-called kinematic constraint on gluon evolution at small *** the constraint on the real emission term of the gluon ladder diagram,we obtain an integro-differential form of the Balitsky-Fadin-Kuraev-Lipatov(BFKL)*** we solve the equation analytically using the method of *** sketch the Bjorken x and transverse momentum kt2 dependence of our solution of unintegrated gluon distributions f(x,kt2)in the kinematic constraint supplemented BFKL equation and contrasted the same with the original BFKL *** we extract the integrated gluon density xg(x,Q2)from unintegrated gluon distributions f(x,kt2)and compared our theoretical prediction with that of global data fits,namely NNPDF3.1 sx and *** we illustrate the phenomenological implication of our solution for unintegrated gluon distribution f(x,kT2)towards exploring high precision HERA DIS data by the theoretical prediction of proton structure functions(F2 and FL).

关键词： parton evolution equation gluon distribution function perturbative QCD

Multipliers on Vector-valued L^1-spaces for Hypergroups

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2018年第7期34卷 1059-1073页

作者： R.sarma N.Shravan kumar Vishvesh kumar Department of Mathematics Indian Institute of Technology Delhi

In this article, we extend the well known Wendel＇s theorem to the context of vector-valued L1-spaces on hypergroups. In this regard, various cases have been studied.

关键词： Vector-valued Ll-spaces hypergroups multipliers translation invariant operators Fouriertransform

Dynamic characterization of the migration of a mining pit in an alluvial channel

在线全文

学校读者我要写书评

暂无评论

International Journal of Sediment Research 2019年第2期34卷 155-165页

作者： Bandita Barman Bimlesh kumar Arup kumar sarma Department of Civil Engineering Indian Institute of Technology Guwahati

Research on in-channel sand mining is imperative as it may have a significant impact on channel *** this quest to quantitatively comprehend the phenomenon,experimental studies were done to investigate the dynamic characteristics of the migration of a mining *** evaluation of the migration rate of a mining pit in a physical scale model has found a rise in the migration rate of the pit's upstream edge with increasing discharge.A wavelet analysis applied for analyzing scale-dependent migration of the bed profile of a mining pit also revealed similar ***,the wavelet analysis examined the length-scale dependent migration of a mining pit and a decrease in the migration rate has been observed with an increase in the length *** plan form of a pit(length-to-width ratio)governs the erosion and deposition processes around the *** physical and statistical approaches show an increase in the migration rate with an increase in the length-to-width ratio of the *** empirical formulation has been developed for calculating the migration rate of the upstream edge of a mining pit based on pit geometry(length-to-width ratio),average flow velocity,and critical shear stress of the bed *** results also show a higher bed load transport rate in the channel subjected to mining as compared to a plain bed channel.

关键词： Sand mining Migration Wavelet analysis Bed load transport

DNA Barcode ITS Effectively Distinguishes the Medicinal Plant Boerhavia diffusa from Its Adulterants

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Genomics, Proteomics & Bioinformatics 2012年第6期10卷 364-367页

作者： Dhivya Selvaraj Dhivya Shanmughanandhan rajeev kumar sarma Jijo C. Joseph Ramachandran V. Srinivasan Sathishkumar Ramalingam Plant Genetic Engineering Laboratory Department of Biotechnology Bharathiar University Department of Botany Bharathiar University

Boerhavia diffusa （B. diffusa）, also known as Punarnava, is an indigenous plant in India and an important component in traditional Indian medicine. The accurate identification and collection of this medicinal herb is vital to enhance the drug＇s efficacy and biosafety. In this study, a DNA barcoding technique has been applied to identify and distinguish B. diffusa from its closely-related species. The phylogenetic analysis was carried out for the four species of Boerhavia using barcode candidates including nuclear ribosomal DNA regions ITS, ITS1, ITS2 and the chloroplast plastid gene psbA-trnH. Sequence alignment revealed 26% polymorphic sites in ITS, 30% in ITS1, 16% in ITS2 and 6% in psbA-trnH, respectively. Additionally, a phylogenetic tree was constructed for 15 species using ITS sequences which clearly distinguished B. diffusa from the other species. The ITS1 demonstrates a higher transition/transversion ratio, percentage of variation and pairwise distance which differentiate B. diffusa from other species of Boerhavia. Our study revealed that 1TS and ITS1 could be used as potential candidate regions for identifying B. diffusa and for authenticating its herbal products.

关键词： Adulterant Boerhavia diffusa ITS DNA barcoding Punarnava

A BCH code assisted modified NCO based LSPF-DPLL topology for Nakagami-m, Rayleigh and Rician fading channels

在线全文

学校读者我要写书评

暂无评论

Digital Communications and Networks 2019年第2期5卷 102-110页

作者： Sabyasachi Bhattacharyya Aradhana Misra Kandarpa kumar sarma Department of Electronics and Telecommunication Engineering Barak Valley Engineering CollegeNiralaKarimganj 788701AssamIndia Department of Electronics and Communication Engineering Gauhati UniversityGopinath Bordoloi NagarJalukbariGuwahati 781014AssamIndia Department of Electronics and Communication Technology Gauhati UniversityGopinath Bordoloi NagarJalukbariGuwahati 781014AssamIndia

In spite of the rapid developments in communication technologies over the past few decades, which include attractive features offered by the presently used 3G/4G systems,让 continues to be a challenge to render adequate services with the exponential rise in the number of users and applications. However, efficient alternatives, including 5G methods, are being explored to mitigate this problem. Such systems also aspire to render sustained coverage with lesser constraints on power and Quality of Service (QoS). Today, versatile Digital Phase Locked Loop (DPLL) based packages find place as communication receivers. Of late, a Least Square Polynomial Fitting DPLL (LSPF-DPLL) with Modified Phase Resolving Numerically Controlled Oscillator (MPR-NCO), which demonstrates excellent time performance and maintains satisfactory error rates, was proposed. A Bose, Chaudhuri, and Hocquenghem (BCH) channel code assisted version of the MPR-NCO based LSPF-DPLL system is presented here. The proposed system exhibits better B让 Error Rate (BER), throughput, and baud rate levels over the previously proposed uncoded version.

关键词： Coding Fading Frequency tracking Least squares Phase recovery

Bile acid synthetic defects: Simplified approach in a nutshell

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Hepatobiliary & Pancreatic Diseases International 2020年第1期19卷 80-84页

作者： Aathira Ravindranath Moinak Sen sarma Surender kumar Yachha Department of Pediatric Gastroenterology Sanjay Gandhi Post Graduate Institute of Medical Sciences

Bile acid synthetic defects(BASD)constitute a rare group of disorders with manifestations in children as well as *** the individual BASD mandates a lucid understanding of the bile acid synthetic ***,the synthesis pathway is complex,consisting of numerous enzymes and intermediate products that are volatile in the physician’s *** paucity of literature,a simplified approach to the BASD is presented in this paper.

关键词： synthetic simplified approach

Hereditary fructose intolerance: A comprehensive review

在线全文

学校读者我要写书评

暂无评论

World Journal of Clinical Pediatrics 2022年第4期11卷 321-329页

作者： Sumit kumar Singh Moinak Sen sarma Department of Pediatrics Sri Aurobindo Medical College and PGIIndore 453555Madhya PradeshIndia Department of Pediatric Gastroenterology Sanjay Gandhi Postgraduate Institute of Medical SciencesLucknow 226014India

Hereditary fructose intolerance(HFI)is a rare autosomal recessive inherited disorder that occurs due to the mutation of enzyme aldolase B located on chromosome 9q22.3.A fructose load leads to the rapid accumulation of fructose 1-phosphate and manifests with its downstream *** commonly children are affected with gastrointestinal symptoms,feeding issues,aversion to sweets and *** manifestations include an asymptomatic increase of transaminases,steatohepatitis and rarely liver *** involvement usually occurs in the form of proximal renal tubular acidosis and may lead to chronic renal *** confirmation,a genetic test is favored over the measurement of aldolase B activity in the liver biopsy *** crux of HFI management lies in the absolute avoidance of foods containing fructose,sucrose,and sorbitol(FSS).There are many dilemmas regarding tolerance,dietary restriction and occurrence of *** with HFI who adhere strictly to FSS free diet have an excellent prognosis with a normal *** review attempts to increase awareness and provide a comprehensive review of this rare but treatable disorder.

关键词： Hereditary Fructose Intolerance Children Liver Steatohepatitis Aldolase

Diversity of Middle Eocene Coralline Red Algae from the Prang Limestone(Shella Formation) of Jaintia Hills, Meghalaya, NE Himalaya, India with special emphasis on palaeoenvironment

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

科学通报 2013年第S1期58卷 118-125页

作者： GHOSH Amit kumar sarma Ajanta SARKAR Suman Birbal Sahni Institute of Palaeobotany Department of Geology GC College

Palaeocene-Eocene carbonates of shallow marine sequence belonging to Shella Formation of Jaintia Group are well developed in the south of the Jaintia Hills, Meghalaya and represent an excellent outcrop of shelf sediments in North Eastern Himalaya, India. These outcrops are exposed along the southern fringe of Shillong Plateau. The Prang Limestone is the uppermost lithostratigraphic unit of the Shella Formation within the Jaintia Group. It is overlain by sand-shale alternation of the Kopili Formation and underlain by the Narpuh Sandstone. A rich assemblage of larger foraminifera including Nummulites, Discocyclina etc. has been recorded earlier from the Prang Limestone and based on the foraminiferal assemblage, a Middle Eocene to Early Late Eocene age has been assigned to the Prang Limestone. Thin section analysis of the Prang Limestone revealed the abundance of well preserved coralline red algae along with other well preserved and significant biogenic elements. Morpho-taxonomical study reveals that the algal flora is represented by seven species belonging to the families Hapalidiaceae(Subfamily: Melobesioideae), Corallinaceae(Subfamily: Mastophoroideae) and Sporolithaceae. The dominance of melobesioid and mastophoroid forms is the characteristic feature of this algal assemblage. Coralline algae occur mostly in encrusting growth form with orbitoid foraminifera and occasionally the coralline algae form rhodoliths. On this basis of algal forms it can be inferred that they thrived in a shallow, warm, shelf environment of normal salinity.

关键词： diversity Coralline algae taxonomy Middle Eocene Shella Formation Meghalaya NE Himalaya India