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Perspectives on Higgs boson and supersymmetry

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Frontiers of physics 2013年第3期8卷 294-301页

作者： Pran nath Department of Physics Northeastern University Boston MA 02115-5005 USA

We review the recent discovery of the Higgs like particle at - 125 GeV and its implications for par- ticle physics models. Specifically the implications of the relatively high Higgs mass for the discovery of supersymmetry are discussed. Several related topics such as naturalness and supersymmetry, dark matter and unification are also discussed.

关键词： 125 GeV Higgs supersymmetry (SUSY) dark matter unification

Propagation of a strong cylindrical shock wave in a rotational axisymmetric dusty gas with exponentially varying density

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Research in Astronomy and Astrophysics 2010年第5期10卷 445-460页

作者： Gorakh nath Department of Mathematics National Institute of Technology Raipur G. E. Road Raipur-492010 India

Non-similarity solutions are obtained for one-dimensional isothermal and adiabatic flow behind strong cylindrical shock wave propagation in a rotational ax-isymmetric dusty gas, which has a variable azimuthal and axial fluid velocity. The dusty gas is assumed to be a mixture of small solid particles and perfect gas. The equi-librium flow conditions are assumed to be maintained, and the density of the mixture is assumed to be varying and obeying an exponential law. The fluid velocities in the ambient medium are assumed to obey exponential laws. The shock wave moves with variable velocity. The effects of variation of the mass concentration of solid particles in the mixture, and the ratio of the density of solid particles to the initial density of the gas on the flow variables in the region behind the shock are investigated at given times. Also, a comparison between the solutions in the cases of isothermal and adia-batic flows is made.

关键词： shock wave — equation of state — stars: rotation — radiative transfer — interplanetary medium

Pressure-Induced Instability Characteristics of a Transient Flow and Energy Distribution through a Loosely Bent Square Duct

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Energy Engineering 2022年第1期119卷 429-451页

作者： Sreedham Chandra Adhikari Ratan Kumar Chanda Sidhartha Bhowmick Rabindra nath Mondal Suvash Chandra Saha Department of Mathematics Jagannath UniversityDhaka1100Bangladesh School of Mechanical and Mechatronic Engineering University of Technology SydneyNew South WalesAustralia

Due to widespread applications of the bent ducts in engineering fields such as in chemical,mechanical,bio-mechanical and bio-medical engineering,scientists have paid considerable attention to invent new characteristics of fluid flow in a bent duct(BD).In the ongoing study,a spectral-based numerical technique is applied to explore flow characteristics and energy distribution through a loosely bent square duct(BSD)of small *** is accelerated due to combined action of the non-dimensional parameters;the Grashof number Gr(=1000),the curvatureδ(=0.001),and the Prandtl number Pr(=7.0)over a wide domain of the Dean number 0

关键词： Square-shaped duct curvature secondary flow energy distribution chaos

Studying the efficacy of isolation as a control strategy and elimination of tuberculosis in India:A mathematical model

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Infectious Disease Modelling 2023年第2期8卷 458-470页

作者： Archana Singh Bhadauria Hom nath Dhungana Vinay Verma Stephen Woodcock Tapan Rai Department of Mathematics and Statistics Deen Dayal Upadhyaya Gorakhpur UniversityIndia School of Mathematical and Physical Sciences University of Technology SydneyAustralia Faculty of Mathematical and Statistical Sciences Institute of Natural Sciences and HumanitiesShri Ramswaroop Memorial UniversityUttar PradeshIndia

India has the highest burden of both tuberculosis(TB)and multidrug-resistant TB(MDRTB)based on the WHO Global TB Report *** the available data suggest that the total TB incidence has declined,the absolute number of new cases is still *** number of reported TB cases in India in 2018 was 2.2 million,which was 1.5 million in *** 47%increment in TB case notification in India within a decade shows a persistent public health *** contributes about 22%of the World's TB *** National Strategic Plan 2017e2025,sets out the government plans to eliminate TB by ***,the milestone seems unrealistic to achieve the TB eradication goal by *** developed a five-dimensional mathematical model to understand the TB dynamics in India and investigate the possibility of the earliest TB eradication time *** model stratifies the entire TB class into three different classes as drug-sensitive(DS),MDR,and isolated *** effective reproduction number,equilibrium points,and stability analysis of the model were carried *** model predicts the total estimated cases of DS-TB and MDR-TB from 2018 to 2035 through numerical simulation and suggests that TB may be eliminated by 2035 in India if the treatment success rate could be achieved to 95%,by contact tracing and isolating at least 50%of MDR-TB.

关键词： Multi-drug resistant Drug-sensitive Isolation Reproduction number Mathematical modelling

Aging Trend and Situation in Nepal

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Advances in Aging Research 2023年第3期12卷 39-48页

作者： Hom nath Chalise MPhil Lead PhD Program Central Department of Population Studies Tribhuvan University Kathmandu Nepal

Aging is a natural lifelong process until death. The proportions of the older population are increasing rapidly in Nepal too. There are 2.97 million older people in Nepal as of the 2021 census which is a 38.2% increase compared to the previous census of 2011. The proportion of the older population reached 10.21% of the total population of Nepal. During this decade, Nepal’s average population growth rate is 0.92% and the older population growth rate is 3.29% per year. On the other hand, Nepal’s total fertility is below replacement level, infant mortality is around 23 per thousand live births and average life expectancy is now around 71 years. The median age of Nepal is 25 years and the index of aging increased rapidly from 23.3 in 2011 to 36.7 in the 2021 census of Nepal. These indicators show aging is taking place rapidly and the caregiving burden may increase rapidly in the coming days due to the tendency of migration of the young population to other countries. In this context, the Nepal government needs to focus on how to manage the population and provide quality services and social security for the growing older people of Nepal.

关键词： Aging in Nepal Older People of Nepal The Index of Aging Nepal

Development and experimental investigation of duplex turning process

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Advances in Manufacturing 2017年第2期5卷 149-157页

作者： Ravindra nath Yadav Department of Mechanical Engineering BBD National Institute of Technology and Management Lucknow 226028India

The aim of the present study was to develop a novel turning process with the simultaneous application of two cutting tools in place of a single cutting tool during machining of rotating surfaces. This process is referred to as duplex turning, and is used to eliminate the need for a secondary final cut operation following the turning process. To achieve this, a secondary （auxiliary） tool post is mounted on the cross slide of the centre lathe machine after fabrication. The secondary tool post is used to hold a secondary cutting tool that penetrates the workpiece from opposite side of the primary cutting tool to perform the finish cut operation during turn machining of the cylin- drical workpiece. The performance of the developed process was tested on AISI 1040 alloy steel, using two single point cutting tools made of high speed steel. The effects of cutting velocity, feed rate, primary depth of cut and secondary depth of cut were analyzed and discussed with regard to average surface roughness, and were also compared with normal turning process. From the results, it was concluded that duplex turning process was capable of providing better surface finishes compared to those generated by normal turning. It was also found that higher cutting velocity yielded better surface finishes within the determined ranges of the selected parameters.

关键词： Cutting Design of experiment Machining Surface roughness Turning

Efficient contraflow algorithms for quickest evacuation planning

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Science China Mathematics 2018年第11期61卷 2079-2100页

作者： Urmila Pyakurel Hari Nandan nath Tanka nath Dhamala Central Department of Mathematics Tribhuvan University Department of Mathematics Bhaktapur Multiple Campus Tribhuvan University

The optimization models and algorithms with their implementations on flow over time problems have been an emerging field of research because of largely increasing human-created and natural disasters *** an optimal use of transportation network to shift affected people and normalize the disastrous situation as quickly and efficiently as possible,contraflow configuration is one of the highly applicable operations research(OR)*** increases the outbound road capacities by reversing the direction of arcs towards the safe destinations that not only minimize the congestion and increase the flow but also decrease the evacuation time *** this paper,we sketch the state of quickest flow solutions and solve the quickest contraflow problem with constant transit times on arcs proving that the problem can be solved in strongly polynomial time O(nm^2(long n)~2)where n and m are number of nodes and number of arcs,respectively in the *** contraflow solution has the same computational time bound as that of the best min-cost flow ***,we also introduce the contraflow approach with load dependent transit times on arcs and present an efficient algorithm to solve the quickest contraflow problem *** the claim,our computational experiments on Kathmandu road network and on randomly generated instances perform very well matching the theoretical *** a sufficiently large number of evacuees,about double flow can be shifted with the same evacuation time and about half time is sufficient to push the given flow value with contraflow reconfiguration.

关键词：算法优化模型正常化运筹学灾难时间

Ocular manifestations of central insulin resistance

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Neural Regeneration Research 2023年第5期18卷 1139-1146页

作者： Muneeb A.Faiq Trina Sengupta Madhu nath Thirumurthy Velpandian Daman Saluja Rima Dada Tanuj Dada Kevin C.Chan Dr.Rajendra Prasad Centre for Ophthalmic Sciences All India Institute of Medical SciencesNew DelhiIndia Neuroimaging and Visual Science Laboratory Department of OphthalmologyNYU Grossman School of MedicineNYU Langone HealthNew York UniversityNew YorkNYUSA Medical Biotechnology Laboratory Dr.B.R.Ambedkar Center for Biomedical ResearchUniversity of DelhiDelhiIndia Dr.Baldev Singh Sleep Laboratory Department of PhysiologyAll India Institute of Medical SciencesNew DelhiIndia Department of Ocular Pharmacology Dr.Rajendra Prasad Center for Ophthalmic SciencesAll India Institute of Medical SciencesNew DelhiIndia Laboratory for Molecular Reproduction and Genetics Department of AnatomyAll India Institute of Medical SciencesNew DelhiIndia

Central insulin resistance, the diminished cellular sensitivity to insulin in the brain, has been implicated in diabetes mellitus, Alzheimer’s disease and other neurological disorders. However, whether and how central insulin resistance plays a role in the eye remains unclear. Here, we performed intracerebroventricular injection of S961, a potent and specific blocker of insulin receptor in adult Wistar rats to test if central insulin resistance leads to pathological changes in ocular structures. 80 mg of S961 was stereotaxically injected into the lateral ventricle of the experimental group twice at 7 days apart, whereas buffer solution was injected to the sham control group. Blood samples, intraocular pressure, trabecular meshwork morphology, ciliary body markers, retinal and optic nerve integrity, and whole genome expression patterns were then evaluated. While neither blood glucose nor serum insulin level was significantly altered in the experimental or control group, we found that injection of S961 but not buffer solution significantly increased intraocular pressure at 14 and 24 days after first injection, along with reduced porosity and aquaporin 4 expression in the trabecular meshwork, and increased tumor necrosis factor α and aquaporin 4 expression in the ciliary body. In the retina, cell density and insulin receptor expression decreased in the retinal ganglion cell layer upon S961 injection. Fundus photography revealed peripapillary atrophy with vascular dysregulation in the experimental group. These retinal changes were accompanied by upregulation of pro-inflammatory and pro-apoptotic genes, downregulation of anti-inflammatory, anti-apoptotic, and neurotrophic genes, as well as dysregulation of genes involved in insulin signaling. Optic nerve histology indicated microglial activation and changes in the expression of glial fibrillary acidic protein, tumor necrosis factor α, and aquaporin 4. Molecular pathway architecture of the retina revealed the three most s

关键词： brain ciliary bodies gene expression inflammation insulin receptor insulin resistance intraocular pressure neurodegeneration optic nerve retina retinal ganglion cells trabecular meshwork

Investigating the Dominant Source for the Generation of Gravity Waves during Indian Summer Monsoon Using Ground-based Measurements

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Advances in Atmospheric Sciences 2013年第1期30卷 153-166页

作者： Debashis nath 陈文 Center for Monsoon System Research Institute of Atmospheric PhysicsChinese Academy of Sciences

Over the tropics, convection, wind shear （i.e., vertical and horizontal shear of wind and/or geostrophic adjustment comprising spontaneous imbalance in jet streams） and topography are the major sources for the generation of gravity waves. During the summer monsoon season （June August） over the Indian subcontinent, convection and wind shear coexist. To determine the dominant source of gravity waves during monsoon season, an experiment was conducted using mesosphere-stratosphere-troposphere （MST） radar situated at Gadanki （13.5°N, 79.2°E）, a tropical observatory in the southern part of the Indian subcontinent. MST radar was operated continuously for 72 h to capture high-frequency gravity waves. During this time, a radiosonde was released every 6 h in addition to the regular launch （once daily to study low-frequency gravity waves） throughout the season. These two data sets were utilized effectively to characterize the jet stream and the associated gravity waves. Data available from collocated instruments along with satellite-based brightness temperature （TBB） data were utilized to characterize the convection in and around Gadanki. Despite the presence of two major sources of gravity wave generation （i.e., convection and wind shear） during the monsoon season, wind shear （both vertical shear and geostrophic adjustment） contributed the most to the generation of gravity waves on various scales.

关键词： convection wind shear gravity waves MST radar radiosonde