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Model based reference metrology for dimensional characterization of micro- and nanostructures

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Optoelectronics Letters 2008年第2期4卷 81-85页

作者： b. bodermann h. bosse Physikalisch-Technische bundesanstalt PTB Bundesallee 100 38116 Braunschweig Germany

The requirements on the precision of dimensional metrology are especially stringent in the area of semiconductor manufacturing. This holds in particular for the measurement and control of the linewidths of the smallest structures on masks and silicon wafers and their corresponding reference metrology. In this paper we will describe the physical models and the reference instrumentation which were developed for photomask linewidth metrology at the PTb. It will be shown, how the results of the different methods can be used for comparative analyses. Application of these methods will be demonstrated exemplarily on the basis of newly developed photomask linewidth standards.

关键词：微纳米技术计量方法集成光学特征

Evaluation of SIFOM-FVCOM system for high-fidelity simulation of small-scale coastal ocean flows

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Journal of hydrodynamics 2016年第6期28卷 994-1002页

作者： K.QU h.S.TANG A.AGRAWAL C.b.JIANG b.DENG Department of Civil Engineering City College City University of New York School of hydraulic Engineering Changsha University of Sciences and Technology

This paper evaluates the SIFOM-FVCOM system recently developed by the authors to simulate multiphysics coastal ocean flow phenomena, especially those at small scales. First, its formulation for buoyancy is examined with regard to solution accu- racy and computational efficiency. Then, the system is used to track particles in circulations in the Jamaica bay, demonstrating that large-scale patterns of trajectories of fluid particles are sensitive to small-scales flows from which they are released. Finally, a simulation is presented to illustrate the SIFOM-FVCOM system＇s capability, which is beyond the reach of other existing models, to directly and simultaneously model large-scale storm surges as well as small-scale flow structures around bridge piers within the hudson River during the hurricane Sandy.

关键词： coastal ocean flow multiscale multiphysics hybrid method domain decomposition SIFOM-FVCOM system

Contributions of burst-sweep cycles to Reynolds shear stress over fluvial obstacle marks generated in a laboratory flume

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International Journal of Sediment Research 2012年第3期27卷 378-387页

作者： h.MAITY b.S.MAZUMDER Fluvial Mechanics Laboratory Physics and Applied Mathematics UnitIndian Statistical Institute

This paper investigates the phenomena of turbulent bursting events,and to make a comparative study among the events in the scour geometry developed by short circular cylinders of fixed length with different diameters placed on the sand bed transverse to the *** distributions of turbulent kinetic energy(TKE),turbulent diffusion in both longitudinal and vertical directions at different locations of scour marks,and the contributions of burst-sweep cycles to the Reynolds shear stress are presented.

关键词： Scour marks TKE Turbulent diffusion Reynolds stress bursting events

Impact of heat shock on heat shock proteins expression, biological and commercial traits of bombyx mori

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Insect Science 2006年第4期13卷 243-250页

作者： VASUDhA b. ChAVADI APARNA h. SOSALEGOWDA MANJUNAThA h.b OREGOWDA Departments of Sericulture Dharwad 580003 Karnataka India Departments of biochemisrty Karnatak University Dharwad 580 003 Karnataka India

We report the thermotolerance of new bivoltine silkworm, bombyx mori strains Nb4D2, KSO1, NP2, CSR2 and CSR4 and differential expression of heat shock proteins at different instars. Different instars of silkworm larva were subjected to heat shock at 35℃, 40℃ and 45℃ for 2 hours followed by 2 hours recovery. heat shock proteins were analyzed by SDS-PAGE. The impact of heat shock on commercial traits of cocoons was analyzed by following different strategies in terms of acquired thermotolerance over control. Comparatively NP2 exhibited better survivability than other strains. Resistance to heat shock was increased as larval development proceeds in the order of first instar 〉 second instar 〉 third instar 〉 fourth instar 〉 fifth instar in all silkworm strains. Expression of heat shock proteins varies in different instars. 90 kDa in the first, second and third instars, 84 kDa in the fourth instar and 84, 62, 60, 47 and 33 kDa heat shock proteins in fifth instar was observed in response to heat shock. Relative influence of heat shock on commercial traits that correspond to different stages was significant in all strains. In Nb4D2, cocoon and shell weight significantly increased to 17.52% and 19.44% over control respectively. heat shock proteins as molecular markers for evaluation and evolution of thermotolerant silkworm strains for tropics was discussed.

关键词： biological and commercial traits bombyx mori heat shock heat shockproteins molecular chaperones thermotolerance

Effect of Plastic Deformation on Magnetic Properties of Fe-40%Ni-2%Mn Austenitic Alloy

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Journal of Iron and Steel Research International 2007年第4期14卷 56-60页

作者： Selva büyükakka■ h Aktas S Akturk Physics Department Nigde UniversityNigde 51100NigdeTurkey Physics Department Kirikkale UniversityYahsihan 71450KirikkaleTurkey

The effects of plastic deformation on the magnetic properties of austenite structure in an Fe-40% Ni-2 % Mn alloy is investigated by using Mossbauer spectroscopy and Differential Scanning Calorimetry （DSC） techniques The morphology of the alloy has been obtained by using Scanning Electron Microscopy （SEM）. The magnetic behaviour of austenite state is ferromagnetic. After plastic deformation, a mixed magnetic structure including both paramagnet- ic and ferromagnetic states has been obtained at the room temperature. The volume fraction changes, the effective hyperfine fields of the ferromagnetic austenite phase and isomery shift values have also been determined by Mossbauer spectroscopy. The Curie point （Tc） and the Neel temperature （TN） have been investigated by means of DSC system for non-deformed and deformed Fe-Ni-Mn alloy. The plastic deformation of the alloy reduces the TN and enhances the paramagnetic character of austenitic Fe-Ni-Mn alloy.

关键词： Mossbauer spectroscopy differential scanning calorimetry (DSC) scanning electron microscopy (SEM) plastic deformation magnetically ordered material ferromagnetic austenite

Controlling Excitation Inversion of a Cooper Pair box Interacting with a Nanomechanical Resonator

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Chinese Physics Letters 2012年第8期29卷 20-24页

作者： C.Valverde h.C.b.de Oliveira A.T.Avelar b.baseia Instituto de Química Universidade de Brasília70919-970BrasíliaDFBrazil Universidade Estadual de Goiás Rod.BR 15375132-903 AnápolisGOBrazil Universidade Paulista Rod.BR 153km 774845-090 GoianiaGOBrazil Instituto de Física Universidade Federal de Goiás74001-970 GoianiaGOBrazil

We investigate the action of time-dependent detunings upon the excitation inversion of a Cooper pair box interacting with a nanomechanical *** method employs the Jaynes–Cummings model with damping,assuming different decay rates of the Cooper pair box and various fixed and time-dependent *** is shown that,when the presence of damping plus constant detunings destroys the collapse/revival effects,convenient choices of time-dependent detunings allow one to reconstruct such events in a perfect *** is also shown that the mean excitation of the nanomechanical resonator is more robust against damping of the Cooper pair box for convenient values of time-dependent detunings.

关键词： Cooper tuning excitation

Subcutaneous cervical emphysema and pneumomediastinum due to a lower gastrointestinal tract perforation

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World Journal of Gastroenterology 2008年第24期14卷 3922-3923页

作者： Georg b Schmidt Maarten W bronkhorst henk h hartgrink Lee h bouwman Department of Surgery Leiden University Medical Center Department of Surgery Bronovo Hospital

This case report describes a 69-year-old man presen-ting with an extensive subcutaneous emphysema in his neck and generalized peritonitis caused by a lower gastrointestinal tract perforation. This case emphasizes that subcutaneous emphysema patients with negative thoracic findings should be scrutinized for signs of retroperitoneal hollow viscus perforation.

关键词： Subcutaneous cervical emphysema Pneumomediastinum Gastrointestinal tract perforation Malignancy Diverticulitis

Situs inversus abdominus and malrotation in an adult with Ladd's band formation leading to intestinal ischaemia

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World Journal of Gastroenterology 2006年第25期12卷 4093-4095页

作者： Ismail h Mallick Rizwan Iqbal Justin b Davies Department of Surgery bradford Royal Infirmary Bradford BD9 6RJUnited Kingdom

Situs inversus abdominus with rotational anomaly of the intestines is an extremely rare condition. Although intestinal malrotation has been recognized as a cause of obstruction in infants and children and may be complicated by intestinal ischaemia, it is very rare in adults. When it occurs in the adult patient, it may present acutely as bowel obstruction or intestinal ischaemia or chronically as vague intermittent abdominal pain. herein, we present an acute presentation of a case of situs inversus abdominus and intestinal malrotation with Ladd＇s band leading to infarction of the intestine in a 32 year old woman.

关键词： Situs inversus, Malrotation Ischaemia,Intestine

Solutions of the two-body Salpeter equation under the Coulomb and exponential potential for any l state with Laplace approach

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Chinese Physics C 2014年第2期38卷 1-4页

作者： A.A.Rajabi E.Momtazi b.h.Yazarloo h.hassanabadi Physics Department Shahrood University of Technology Department of basic Sciences Shahrood Branch Islamic Azad University

In this paper we have solved the two-body spinless-Salpeter（SS） equation under the Coulomb and exponential type potentials. We have applied an approximation for the centrifugal term in our calculations. The energy eigenvalues and the corresponding eigenfunctions are reported by using the Laplace transform approach for any n, states.

关键词： spinless-Salpeter equation Coulomb and exponential potential Laplace approach