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Assessment of Man-made and Natural Hazards in the Surroundings of Hydropower Projects under Construction in the Beas Valley of Northwestern Himalaya

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journal of Mountain Science 2007年第3期4卷 221-236页

作者： Sanjeev Sharma jagdish C. Kuniyal j. C. Sharma G.B. Pant Institute of Himalayan Environment & Development Himachal UnitMohal-Kullu 175 126Himachal Pradesh India Department of Geography Himachal Pradesh University

Mountain ecosystem, on the earth, has plenty of natural resources. In Himachal Pradesh all the rivers are snowfed and therefore rich in water resources. These resources have been supporting enough for the generation of electricity through introducing hydropower projects since the last decade However, every developmental activity has its own negative impacts on the surrounding environment. Due to the fragile nature of topography and delicacy of ecology of the Himalaya, it results in lot of disturbances because of high degree of human interferences like construction of major hydropower projects. The increased extent of geological hazards, such as landslides, rock fall and soil erosion, have mainly due to alike developmental interventions in the natural ecosystem. So understanding and analysing such impacts of the hydropower projects have mainly been on the environment in various forms but natural hazards have been frequent ones. The present study, therefore, focuses mainly on the Parbati Stage II （800 MW） and the Parbati Stage III （520 MW） hydropower projects; both of which fall within the Kullu district of Himachal Pradesh. Based on the perception survey of the local communities, the existing land use pattern, status of total acquired land of the residents by hydropower projects, frequent natural hazards and resultant loss to the local communities due to upcoming construction of hydropower projects surrounding to the Parbati Stage II and III have been analysed in the paper. Also, the preventive measures to mitigate these adverse impacts have been suggested to strengthen these projects in eco-friendly manner in the mountain context.

关键词： Hydropower project under construction local community hazard preventive measure environment northwestern Indian Himalaya

Softening of phonon spectra in metallic glasses

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npj Computational Materials 2016年第1期2卷 31-35页

作者： Reza Mahjoub Nicholas E Hamilton Kevin j Laws Michael Ferry School of Materials Science and Engineering The University of New South WalesSydneyNSWAustralia

The vibrational spectra of a series of MgZnCa amorphous alloys were computed using density functional theory and implementing the small displacement *** atomic structures of the alloys were obtained by ab initio molecular dynamics *** vibrational thermodynamic properties were calculated as a function of temperature and,in particular,the specific heat at low temperature was approximated by temperature cubed based on the Debye *** computed the contribution of Mg vibrations to the specific heat and investigated the softening of Mg phonon spectra,where the maximum allowed vibrational frequency is lowered and highly collective diffusion processes are *** statistical correlation between the reported critical casting thickness of the alloys and softening of Mg phonons was *** calculations were performed for two distinctively different amorphous ZrTiCuAl alloys with large and small reported critical casting thickness,*** findings were consistent with those of the MgZnCa alloys.

关键词： alloys softening casting

Flow pattern analysis of linear gradient flow distribution

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Applied Mathematics and Mechanics(English Edition) 2015年第1期36卷 81-106页

作者： Da-ming LI Xiao-yu LI Yan-qing LI R.j.FARAHANI School of Civil Engineering & Key Laboratory of Harbor & Ocean Engineering Ministry of Education Tianjin University Civil and Environmental Engineering Johns Hopkins University Civil Engineering The University of Adelaide

This paper uses the Oseen transformation to solve the differential equations governing motion of the vertical linear gradient flow distribution close to a wall surface. The Navier-Stokes equations are used to consider the inertia term along the flow direction. A novel contour integral method is used to solve the complex Airy function. The boundary conditions of linear gradient flow distribution for finite problems are determined. The vorticity function, the pressure function, and the turbulent velocity profiles are provided, and the stability of particle trajectories is studied. An Lx-function form of the third derivative circulation is used to to simplify the solution. Theoretical results are compared with the experimental measurements with satisfactory agreement.

关键词： linear gradient distribution flow contour integral stability analysis Airyfunction Oseen transformation

Mucosa-associated bacteria in two middle-aged women diagnosed with collagenous colitis

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World journal of Gastroenterology 2012年第14期18卷 1628-1634页

作者： Rita j Gustafsson Bodil Ohlsson Cecilia Benoni Bengt jeppsson Crister Olsson Department of Clinical Sciences Gastroenterology SectionSkne University HospitalLund University20502 MalmSweden Department of Surgery Skne University HospitalLund University20502 MalmSweden Food Technology Engineering and Nutrition Lund University22100 LundSweden

AIM:To characterize the colon microbiota in two women histologically diagnosed with collagenous colitis using a culture-independent ***:Biopsies were taken from the ascending colon and the total DNA was *** bacterial primers were used to amplify the bacterial 16S rRNA *** amplicons were then cloned into competent Escherichia coli *** clones were sequenced and identified by comparison to known ***:The clones could be divided into 44 different *** microbiota was dominated by Firmicutes and *** phylotypes werefound in both patients and constituted 47.5% of the total number of *** these,the most dominating were clones similar to Bacteroides cellulosilyticus,Bacteroides caccae,Bacteroides thetaiotaomicron,Bacteroides uniformis and Bacteroides dorei within *** similar to Faecalibacterium prausnitzii and Clostridium citroniae were also found in both ***:A predominance of potentially pathogenic Bacteroides spp.,and the presence of clones showing similarity to Clostridium clostridioforme were found but the overall colon microbiota showed similarities to a healthy *** for collagenous colitis other than an adverse bacterial flora must also be considered.

关键词： Microscopic colitis Collagenous colitis Lymphocytic colitis Colonic microbiota 16S rRNA sequencing

Control-based Fault Current Limiter for Minimizing Impact of Distributed Generation Units on Protection Systems

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journal of Modern Power Systems and Clean Energy 2023年第2期11卷 643-650页

作者： Pablo E.Muñoz Ricardo j.Mantz Sergio A.González Instituto LEICI UNLPCONICETLa Plata 1900La PlataArgentina Commission of Scientific Researches of the Buenos Aires Province(CICpBA) La PlataArgentina

Distributed generation units(DGUs)bring some problems to the existing protection system,such as those associated with protection blinding and sympathetic *** is known that fault current limiters(FCLs)help minimize the negative impact of DGUs on the protection *** this paper,a control-based FCL is proposed,i.e.,the FCL is integrated into the DGU control *** this end,a predictive control strategy with fault current limitation is *** this way,a DGU is controlled,not only for power exchange with the power grid but also to limit its fault current *** proposal is posed as a constrained optimization problem allowing taking into account the current limit explicitly in the design process as a closed-loop solution.A linear approximation is proposed to cope with the inherent nonlinear *** proposal does not require incorporating extra equipment or mechanisms in the control loop,making the design process *** evaluate the proposed control-based FCL,both protection blinding and sympathetic tripping scenarios are *** control confines the DGU currents within the constraints quickly,avoiding large transient ***,the impact on the protection system is reduced without the necessity that the DGU goes out of service.

关键词： Distributed generation distribution network protection power electronic converter fault current limiter model-based predictive controller

Regenerative potential of targeting glycogen synthase kinase-3 signaling in neural tissues

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Neural Regeneration Research 2015年第12期10卷 1912-1913页

作者： Eui-Man jung jeffrey j.Moffat Woo-Yang Kim Department of Developmental Neuroscience Munroe-Meyer InstituteUniversity of Nebraska Medical Center

Multiple roles of glycogen synthase kinase-3（GSK-3）in neural tissues：GSK-3 is a serine/threonine kinase that has two isoforms encoded by two different genes,GSK-3αand GSK-3β,in ***-3 has several sites of serine a... 详细信息

关键词： GSK Regenerative potential of targeting glycogen synthase kinase-3 signaling in neural tissues

Quantum correlations relativity for continuous variable systems

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Science China(Physics,Mechanics & Astronomy) 2013年第4期56卷 732-736页

作者： Dugi M. Arsenijevi M. jekni-Dugi j. Department of Physics Faculty of Science Kragujevac 34000 Serbia Department of Physics Faculty of Science Ni s 18000 Serbia

It is shown that a choice of degrees of freedom of a bipartite continuous variable system determines the amount of non-classical correlations (quantified by discord) in the system's state. Non-classical correlations (that include entanglement as a special kind of correlations) are ubiquitous for such systems. For a quantum state, if there are not non-classical correlations (quantum discord is zero) for one, there are in general non-classical correlations (quantum discord is non-zero) for another set of the composite system's degrees of freedom. The physical relevance of this "quantum correlations relativity" is emphasized also in the more general context.

关键词： entanglement non-classical correlations quantum discord tensor product structure

A stiffness-adaptive control system for nonlinear stiffness actuators

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Science China(Information Sciences) 2019年第5期62卷 32-34页

作者： Yaru ZHAO Zhibin SONG Tianyu MA j.S.DAI Key Laboratory of Mechanism Theory and Equipment Design of Ministry of Education School of Mechanical EngineeringTianjin University Centre for Robotics Research School of Natural and Mathematical Sciences King's CollegeLondon

Dear editor,In human robot interaction (HRI), actuators with high stiffness can realize high bandwidth at the cost of safety performance, whereas actuators with low stiffness can decrease response oscillation and enha... 详细信息

关键词： A stiffness-adaptive control system for nonlinear stiffness actuators Figure

Precision of Radiation Chemistry Networks: Playing jenga with Kinetic Models for Liquid-Phase Electron Microscopy

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Precision Chemistry 2023年第10期1卷 592-601页

作者： Birk Fritsch Paolo Malgaretti jens Harting Karl j.j.Mayrhofer Andreas Hutzler Helmholtz Institute erlangen-Nürnberg for Renewable Energy(IEK-11) Forschungszentrum Jülich GmbH91058 ErlangenGermany Department of Chemical and Biological Engineering and Department of Physics Friedrich-Alexander-Universität Erlangen-Nürnberg91058 ErlangenGermany

Liquid-phase transmission electron microscopy(LP-TEM)is a powerful tool to gain unique insights into dynamics at the *** electron probe,however,can induce significant beam effects that often alter observed phenomena such as radiolysis of the aqueous *** magnitude of beam-induced radiolysis can be assessed by means of radiation chemistry simulations potentially enabling quantitative application of ***,the computational cost of these simulations scales with the amount of reactants *** minimize the computational cost,while maintaining accurate predictions,we optimize the parameter space for the solution chemistry of aqueous systems in general and for diluted HAuCl4 solutions in *** results indicate that sparsened kinetic models can accurately describe steady-state formation during LP-TEM and provide a handy prerequisite for efficient multidimensional *** emphasize that the demonstrated workflow can be easily generalized to any kinetic model involving multiple reaction pathways.

关键词： Electron beam effects gold radiolysis kinetic modeling simulation efficiency liquid cell transmission electron microscopy