نتایج جستجو برای: protected

تعداد نتایج: 55122  

Abbas Tarassoli Azadeh Papan, Zahra Shahidian

In this study, we have been involved in the synthesis and characterization studies of a new cyclotriorganophosphazenes complex with protected phloroglusine ligand. Firstly,we synthesized hexachlorocyclotirphosphazene from ammonium chloride and phosphorus pentachloride reaction and then two hydroxyl groups of the phloroglusine ligand were protected with methyl iodide and tosyl chloride. Fina...

2008
D. C. Braun A. C. Birch

We present a comprehensive set of observations of the interaction of pmode oscillations with sunspots using surface-focused seismic holography. Maps of travel-time shifts, relative to quiet-Sun travel times, are shown for incoming and outgoing p modes as well as their mean and difference. We compare results using phase-speed filters with results obtained with filters that isolate single p-mode ...

2013
Rachida Parks Rolf T. Wigand

With rising unpredictability and continued changes in the healthcare environment, organizational responses to information privacy threats are unclear, needing better classification and precision. This paper presents an innovative approach by combining the pressures of the healthcare environment and its internal context by extending two organizational typologies: Oliver’s (1991) strategic respon...

2007
Alexander G. Kosovichev

The abundance of helium in the Sun's interior is estimated by the method of`model-oriented' helioseismic inversion of solar oscillation frequencies. In this method, the equations of state and thermal balance are used in addition to the hydrostatic equation. By inverting the observed p-mode frequencies, direct evidence for gravitational settling of helium has been obtained. However, the helium s...

1996
PAWAN KUMAR

The stochastic excitation of solar oscillations due to turbulent convection is reviewed. A number of different observational results that provide test for solar p-mode excitation theories are described. I discuss how well the stochastic excitation theory does in explaining these observations. The location and properties of sources that excite solar p-modes are also described. Finally, I discuss...

2014
Ashraf M. Zenkour Daoud S. Mashat

Thermal buckling response of functionally graded plates is presented in this paper using sinusoidal shear deformation plate theory (SPT). The material properties of the plate are assumed to vary according to a power law form in the thickness direction. Equilibrium and stability equations are derived based on the SPT. The non-linear governing equations are solved for plates subjected to simply s...

1999
Sarbani Basu J. Christensen-Dalsgaard

The observed solar p-mode frequencies provide a powerful diagnostic of the internal structure of the Sun and permit us to test in considerable detail the physics used in the theory of stellar structure. Amongst the most commonly used techniques for inverting such helioseismic data are two implementations of the optimally localized averages (OLA) method, namely the Subtractive Optimally Localize...

2003
ROBERT C. DURHAM MOYRA GUTHRIE R. VICTOR DAVID A. REID LINDA R. TRELIVING DAVID FOWLER RANALD R. MACDONALD

Results Treatmenteffectsweremodest butthe CBT condition gave significantly greater improvement in overall symptom severity thanthe SPTorTAUconditions combined (F (1,53)1⁄44.14; P1⁄40.05).Both the CBTand SPT conditions combined gave significantlygreater improvement in severityof delusions than did theTAU condition (F (1,53)1⁄44.83;P1⁄40.03). Clinically significant improvementswere achievedby 7/2...

2011
David Alan Grier

Human computing promises new capabilities that cannot be easily provided by computing machinery. However, humans are less disciplined than their mechanical counterparts and hence are liable to produce accidental or deliberate mistakes. As we start to develop regimes for identifying and correcting errors in human computation, we find an important model in the computing groups that operated at th...

2013
Samia Noor

The work is a primary approach to grab attention on probability of liquefaction hazard in Rangpur City Corporation area. The investigated area of Rangpur was suspected to have high liquefaction potential since the foundation soil consists of loose sandy silt with a very shallow aquifer. Standard Penetration Test (SPT), which follows the general format of the Seed-Idriss simplified procedure for...

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