ABSTRACT Porous objects of hydroxyapatite (HA) were prepared by mixing sodium chloride as channeling agent with ultra high molecular weight polyethylene (UHMWPE) as a binder and hydroxyapatite powder. After hot isostatic pressing (HIP) and dissolving the channeling agent, the bioceramic showed an interconnecting porosity with pore diameters in the range of 160–220 µm. The method can be used for any material that is insoluble in water. Such objects are promising for bone regeneration because the interconnecting ...
Tópico(s): Dental Implant Techniques and Outcomes
2006 - Taylor & Francis | Materials and Manufacturing Processes
Fook Y. Wong, Subrata Pal, Subrata Saha,
Transverse impact tests were conducted on the lower legs of 30 human volunteers and on 18 embalmed human tibiae. The impact was produced by an instrumented hammer and the response was monitored by an accelerometer. The apparent flexural wave velocity, measured from the force and acceleration records, showed significant negative correlations with the ages of both the male and female volunteer groups. The decrease in the velocity with increasing age was more pronounced in the female group. Two patients ...
Tópico(s): Bone fractures and treatments
1983 - Elsevier BV | Journal of Biomechanics
Kunal Pal, Sandip Bag, Subrata Pal,
Tópico(s): Facial Trauma and Fracture Management
2007 - Springer Science+Business Media | Journal of Porous Materials
Sunil Jaiswal, Chandrodoy Chattopadhyay, Lipei Du, Ulrich Heinz, Subrata Pal,
Using and comparing kinetic theory and second-order Chapman-Enskog hydrodynamics, we study the nonconformal dynamics of a system undergoing Bjorken expansion. We use the concept of ``free-streaming fixed lines'' for scaled shear and bulk stresses in nonconformal kinetic theory and hydrodynamics, and show that these fixed lines behave as early-time attractors and repellors of the evolution. In the conformal limit, the free-streaming fixed lines reduce to the well-known fixed points of conformal Bjorken ...
Tópico(s): Gas Dynamics and Kinetic Theory
2022 - American Physical Society | Physical review. C
Produção Nacional
Revisado por pares
Amaresh Jaiswal, Najmul Haque, Aman Abhishek, Raktim Abir, Aritra Bandyopadhyay, Khatiza Banu, Samapan Bhadury, S. Bhattacharyya, Trambak Bhattacharyya, Deeptak Biswas, H. C. Chandola, Vinod Chandra, B. Chatterjee, Chandrodoy Chattopadhyay, Nilanjan Chaudhuri, Aritra Das, Arpan Das, Santosh K. Das, Ashutosh Dash, Kishan Deka, Jayanta Dey, Ricardo L. S. Farias, Utsab Gangopadhyaya, Ritesh Ghosh, Sabyasachi Ghosh, Snigdha Ghosh, Ulrich Heinz, Sunil Jaiswal, Guruprasad Kadam, Pallavi Kalikotay, Bithika Karmakar, G. Krein, Avdhesh Kumar, Deepak Kumar, L. Kumar, Manu Kurian, Soumitra Maity, Hiranmaya Mishra, Payal Mohanty, Ranjita K. Mohapatra, Arghya Mukherjee, Munshi G. Mustafa, Subrata Pal, H. C. Pandey, Mahfuzur Rahaman, Ralf Rapp, Deependra Singh Rawat, Sutanu Roy, Victor Roy, Kinkar Saha, N. R. Sahoo, Subhasis Samanta, Sourav Sarkar, Sarthak Satapathy, Fernando E. Serna, Mariyah Siddiqah, Pracheta Singha, V. Sreekanth, Sudipa Upadhaya, Nahid Vasim, Dinesh Kumar Yadav,
In this article, there are 18 sections discussing various current topics in the field of relativistic heavy-ion collisions and related phenomena, which will serve as a snapshot of the current state of the art. Section 1 reviews experimental results of some recent light-flavored particle production data from ALICE collaboration. Other sections are mostly theoretical in nature. Very strong but transient magnetic field created in relativistic heavy-ion collisions could have important observational ...
Tópico(s): Particle physics theoretical and experimental studies
2021 - World Scientific | International Journal of Modern Physics E
The detection of gravitational waves from GW170817 has provided a new opportunity to constrain the equation of state (EOS) of neutron stars. In this article, we investigate the possible existence of quarks inside the neutron star core in the context of GW170817. The nucleon phase is treated within the relativistic nuclear mean-field approach where we have employed a fully comprehensive set of available models, and the quark phase is described in the Bag model. We show that the nucleonic EOSs which ...
Tópico(s): Gamma-ray bursts and supernovae
2021 - Springer Science+Business Media | The European Physical Journal Special Topics
Chandrodoy Chattopadhyay, Sunil Jaiswal, Lipei Du, Ulrich Heinz, Subrata Pal,
We study the dissipative evolution of (0+1)-dimensionally expanding media with Bjorken symmetry using the Boltzmann equation for massive particles in relaxation-time approximation. Breaking conformal symmetry by a mass induces a non-zero bulk viscous pressure in the medium. It is shown that even a small mass (in units of the local temperature) drastically modifies the well-known attractor for the shear Reynolds number previously observed in massless systems. For generic nonzero particle mass, neither ...
Tópico(s): Fluid Dynamics and Turbulent Flows
2021 - Elsevier BV | Physics Letters B
Sreemoyee Sarkar, Chandrodoy Chattopadhyay, Subrata Pal,
We study viscous effects on heavy quark radiative energy loss in a dynamically screened medium with boost-invariant longitudinal expansion. We calculate, to first order in opacity, the energy loss by incorporating viscous corrections in the single-particle phase-space distribution function within relativistic dissipative hydrodynamics. We consider Grad's 14-moment and the Chapman-Enskog-like methods for the nonequilibrium distribution functions. Our numerical results for the charm quark radiative ...
Tópico(s): Particle physics theoretical and experimental studies
2018 - American Physical Society | Physical review. C
Chandrodoy Chattopadhyay, Ulrich Heinz, Subrata Pal, Gojko Vujanovic,
We study the evolution of hydrodynamic and non-hydrodynamic moments of the distribution function using anisotropic and third-order Chapman-Enskog hydrodynamics for systems undergoing Bjorken and Gubser flows. The hydrodynamic results are compared with the exact solution of the Boltzmann equation with a collision term in relaxation time approximation. While the evolution of the hydrodynamic moments of the distribution function (i.e. of the energy momentum tensor) can be described with high accuracy ...
Tópico(s): Fluid Dynamics and Turbulent Flows
2018 - American Physical Society | Physical review. C
Subrata Pal, Sajeeb Mondal, Rajashree Pradhan, Biswajit Biswas, Arindam Banerjee, Debosmita Bhattacharyya,
Clinicopathological pattern of brain tumors:A 3-year study in a tertiary care hospital in India presentation of brain tumors depends on the location, size of the tumors, and growth rate of the neoplasm. [1]There is a high morbidity and mortality in these tumors irrespective of their histological grade. [4]The primary brain tumors involve about two-third of all central nervous system (CNS) neoplasms. [5]According to the WHO classification, CNS tumors have extensive classification and subtypes.Glial tumors ...
Tópico(s): Glioma Diagnosis and Treatment
2016 - Medknow | Clinical Cancer Investigation Journal
Sutripta Sarkar, Subrata Pal, Sunanda Chanda,
Proper management of waste is a major problem in most of the metropolitan areas. Composting is one of the oldest and simplest methods of organic waste stabilization. It is a self-heating biological conversion, which generates suitable end products such as fertilizers, substrates for mushroom cultivation and bio-gas (methane). The thermophilic phase is a very dynamic phase where high microbial activity leads to accelerated degradation of organic matter. This phase also sanitizes the compost. The aim ...
Tópico(s): Municipal Solid Waste Management
2016 - Elsevier BV | Procedia Environmental Sciences
Rajeev S. Bhalerao, Jean-Yves Ollitrault, Subrata Pal,
We present a complete set of multiparticle correlation observables for ultrarelativistic heavy-ion collisions. These include moments of the distribution of the anisotropic flow in a single harmonic, and also mixed moments, which contain the information on correlations between event planes of different harmonics. We explain how all these moments can be measured using just two symmetric subevents separated by a rapidity gap. This presents a multi-pronged probe of the physics of flow fluctuations. ...
Tópico(s): Particle physics theoretical and experimental studies
2015 - Elsevier BV | Physics Letters B
JyotiPrakash Phukan, Anuradha Sinha, Shilpa Jalan, Subrata Pal,
Lymphangioma circumscriptum (LC) is a form of lymphangioma characterised by benign dilation of lymphatic channels, which affects the skin and subcutaneous tissues. The most common sites of LC are mucosa of mouth, tongue, groin, axilla, trunk and proximal region of extremities. Vulva is a rare site of LC. In this report, we are presenting a case of LC of vulva occurring in a 60-year-old female without any obvious reason. The patient presented with multiple genital wart-like papular lesions in the ...
Tópico(s): Tumors and Oncological Cases
2015 - Medknow | Journal of Mid-life Health
The temperature distribution in the tool was calculated by solving the energy equations for the tool and the workpiece in a conjugate manner. The three-dimensional computational fluid dynamics code, FLUENT, was used to model the heat and material flow during FSW of SS304 using the polycrystalline cubic boron nitride pin. The calculated temperature profiles in the workpiece were validated against published experimental data. Heat partitioned to the tool was found to be significantly less than what ...
Tópico(s): Advanced machining processes and optimization
2015 - Elsevier BV | Journal of Materials Processing Technology
Rajeev S. Bhalerao, Amaresh Jaiswal, Subrata Pal,
Complete evolution of the strongly interacting matter formed in ultrarelativistic heavy-ion collisions is studied within a coupled Boltzmann and relativistic viscous hydrodynamics approach. For the initial nonequilibrium evolution phase, we employ a multiphase transport (AMPT) model that explicitly includes event-by-event fluctuations in the number and positions of the participating nucleons as well as of the produced partons with subsequent parton transport. The ensuing near-equilibrium evolution ...
Tópico(s): Quantum Chromodynamics and Particle Interactions
2015 - American Institute of Physics | Physical Review C
Chandrodoy Chattopadhyay, Amaresh Jaiswal, Subrata Pal, Radosław Ryblewski,
By employing a Chapman-Enskog like iterative solution of the Boltzmann equation in relaxation-time approximation, we derive a new expression for the entropy four-current up to third order in gradient expansion. We show that unlike second-order and third-order entropy four-current obtained using Grad's method, there is a nonvanishing entropy flux in the present third-order expression. We further quantify the effect of the higher-order entropy density in the case of boost-invariant one-dimensional ...
Tópico(s): Gas Dynamics and Kinetic Theory
2015 - American Institute of Physics | Physical Review C
Rajeev S. Bhalerao, Jean-Yves Ollitrault, Subrata Pal, Derek Teaney,
We apply principal component analysis to the study of event-by-event fluctuations in relativistic heavy-ion collisions. This method brings out all the information contained in two-particle correlations in a physically transparent way. We present a guide to the method, and apply it to multiplicity fluctuations and anisotropic flow, using ALICE data and simulated events. In particular, we study elliptic and triangular flow fluctuations as a function of transverse momentum and rapidity. This method ...
Tópico(s): Particle physics theoretical and experimental studies
2015 - American Physical Society | Physical Review Letters
Rajeev S. Bhalerao, Amaresh Jaiswal, Subrata Pal, V. Sreekanth,
Derivations of relativistic second-order dissipative hydrodynamic equations have relied almost exclusively on the use of Grad's 14-moment approximation to write $f(x,p)$, the nonequilibrium distribution function in the phase space. Here we consider an alternative Chapman-Enskog-like method, which, unlike Grad's, involves a small expansion parameter. We derive an expression for $f(x,p)$ to second order in this parameter. We show analytically that while Grad's method leads to the violation of the experimentally ...
Tópico(s): Quantum Chromodynamics and Particle Interactions
2014 - American Institute of Physics | Physical Review C
Subrata Pal, B. Biswas, JyotiPrakash Phukan, Sanjay Sengupta, Anuradha Sinha, Rajani Sinha,
Background: Tubular adenomas are rare benign neoplasms of female breast affecting women, predominantly of child-bearing age group. Definitive diagnosis of this tumor is usually achieved after histopathological study. Clinical, radiological, and even cytological features are often insufficient for accurate diagnosis. Aim: The aim of the present study was planned to analyze clinical and radiological features of histologically confirmed cases of tubular adenoma of breast to find out a clue for accurate ...
Tópico(s): Breast Cancer Treatment Studies
2014 - Medknow | North American Journal of Medical Sciences
Rajeev S. Bhalerao, Jean-Yves Ollitrault, Subrata Pal,
Correlators between event planes of different harmonics in relativistic heavy-ion collisions have the potential to provide crucial information on the initial state of the matter formed in these collisions. We present a new procedure for analyzing such correlators, which is less demanding in terms of detector acceptance than the one used recently by the ATLAS Collaboration to measure various two-plane and three-plane correlators in Pb-Pb collisions at the Large Hadron Collider (LHC). It can also be ...
Tópico(s): Quantum Chromodynamics and Particle Interactions
2013 - American Institute of Physics | Physical Review C
Amaresh Jaiswal, Rajeev S. Bhalerao, Subrata Pal,
Starting with the relativistic Boltzmann equation where the collision term is generalized to include nonlocal effects via gradients of the phase-space distribution function, and using Grad's 14-moment approximation for the distribution function, we derive equations for the relativistic dissipative fluid dynamics. We compare them with the corresponding equations obtained in the standard Israel-Stewart and related approaches. Our method generates all the second-order terms that are allowed by symmetry, ...
Tópico(s): Cosmology and Gravitation Theories
2013 - Elsevier BV | Physics Letters B
Rajeev S. Bhalerao, Amaresh Jaiswal, Subrata Pal, V. Sreekanth,
We derive relativistic viscous hydrodynamic equations invoking the generalized second law of thermodynamics for two different forms of the nonequilibrium single-particle distribution function. We find that the relaxation times in these two derivations are identical for shear viscosity but different for bulk viscosity. These equations are used to study thermal dilepton and hadron spectra within longitudinal scaling expansion of the matter formed in relativistic heavy-ion collisions. For consistency, ...
Tópico(s): Cosmology and Gravitation Theories
2013 - American Institute of Physics | Physical Review C
Santanu Majumder, Amit Roychowdhury, Subrata Pal,
Background Hip fracture depends on various anthropometric parameters such as trochanteric soft tissue thickness, body height and body weight. The objective was to evaluate the responses to the variations in anthropometric parameters during sideways fall, and to identify the most dominant parameter among them. Method Seven finite element models were developed having anthropometric variations in trochanteric soft tissue thickness (5–26 mm), body height (1.70–1.88 m), and body weight (63–93.37 kg). These ...
Tópico(s): Bone fractures and treatments
2013 - Elsevier BV | Clinical Biomechanics
Amaresh Jaiswal, Rajeev S. Bhalerao, Subrata Pal,
We present a new derivation of relativistic dissipative hydrodynamic equations, which invokes the second law of thermodynamics for the entropy four-current expressed in terms of the single-particle phase-space distribution function obtained from Grad's 14-moment approximation. This derivation is complete in the sense that all the second-order transport coefficients are uniquely determined within a single theoretical framework. In particular, this removes the long-standing ambiguity in the relaxation ...
Tópico(s): Pulsars and Gravitational Waves Research
2013 - American Institute of Physics | Physical Review C
Sangita Paul, Preeti Jain, Jyotirmoy Mitra, Sangita Dutta, Pamela Bhattacharya, Bijay Bal, Debasish Bhattacharyya, Sujoy Das Gupta, Subrata Pal,
A bacterial strain, designated as TSB-6, was isolated from the sediments of a Tantloi (India) hot spring at 65 °C. The strain showed 98% 16S rRNA gene sequence similarity with Anoxybacillus kualawohkensis strain KW12 and was found to grow optimally at 37 °C. However, growing cells, cell suspensions, and cell-free extracts from 65 °C cultures showed higher Cr(VI) reduction activities when assayed at either 37 or 65 °C than those obtained from 37 °C cultures. On fractionation of extracts from cells grown ...
Tópico(s): Advanced Proteomics Techniques and Applications
2012 - Oxford University Press | FEMS Microbiology Letters
Hadron production and their suppression in Pb + Pb collisions at LHC at a center-of-mass energy of sNN=2.76 TeV are studied within a multiphase transport (AMPT) model whose initial conditions are obtained from the recently updated HIJING 2.0 model. The centrality dependence of charged hadron multiplicity dNch/dη at midrapidity was found quite sensitive to the largely uncertain gluon shadowing parameter sg that determines the nuclear modification of the gluon distribution. We find final-state parton ...
Tópico(s): Quantum Chromodynamics and Particle Interactions
2012 - Elsevier BV | Physics Letters B
Biman Jana, Subrata Pal, Biman Bagchi,
Dielectric dispersion and NMRD experiments have revealed that a significant fraction of water molecules in the hydration shell of various proteins do not exhibit any slowing down of dynamics. This is usually attributed to the presence of the hydrophobic residues (HBR) on the surface, although HBRs alone cannot account for the large amplitude of the fast component. Solvation dynamics experiments and also computer simulation studies, on the other hand, repeatedly observed the presence of a non-negligible ...
Tópico(s): Molecular spectroscopy and chirality
2012 - Springer Science+Business Media | Journal of Chemical Sciences
The new state of matter produced at Relativistic Heavy Ion Collider reveals a strongly coupled quark–gluon plasma with an extremely small shear viscosity to entropy density ratio η/s. We calculate the η/s of an equilibrated hadron matter characterized by a relativistic hadron resonance gas with a Hagedorn mass spectrum that grows exponentially with the hadron mass. We find with increase in temperature of the system the η/s value decreases due to rapid increase in the multiplicity of massive resonances. ...
Tópico(s): Particle physics theoretical and experimental studies
2010 - Elsevier BV | Physics Letters B
Binay K De, Deep Dutta, Subrata Pal, Subhabrata Gangopadhyay, Sumanta Das Baksi, A Pani,
BACKGROUND: Increased nitric oxide production in cirrhosis has been commonly implicated in the genesis of hepatopulmonary syndrome (HPS). Initial studies suggested that garlic, a constituent of the daily diet, may have a role in the treatment of HPS by altering nitric oxide production. OBJECTIVE: To evaluate the effects of oral garlic supplementation on arterial blood gas parameters, and overall morbidity and mortality in patients with HPS. METHODS: Twenty-one and 20 HPS patients were randomly assigned ...
Tópico(s): Nephrotoxicity and Medicinal Plants
2010 - Pulsus Group | Canadian Journal of Gastroenterology
Nuclear multifragmentation in intermediate-energy heavy-ion collisions has long been associated with liquid-gas phase transition. We calculate the shear viscosity to entropy density ratio $\ensuremath{\eta}/s$ for an equilibrated system of nucleons and fragments produced in multifragmentation within an extended statistical multifragmentation model. The temperature dependence of $\ensuremath{\eta}/s$ exhibits behavior surprisingly similar to that of ${\mathrm{H}}_{2}$O. In the coexistence phase of fragments ...
Tópico(s): Particle physics theoretical and experimental studies
2010 - American Institute of Physics | Physical Review C