نتایج جستجو برای: الگوریتم ksw
تعداد نتایج: 22392 فیلتر نتایج به سال:
We have established a new convergent scheme to treat analytically nucleon-nucleon interactions from a chiral effective field theory. The Kaplan-Savage-Wise (KSW) amplitudes are resummed to fulfill the unitarity or right hand cut to all orders below pion production threshold. This is achieved by matching order by order in the KSW power counting the general expression of a partial wave with resum...
Indigenous lactic acid fermented foods may have potential as probiotic treatment for diarrhoea, due to high levels of lactic acid bacteria. In this study the effect of a millet drink, spontaneously fermented by lactic acid bacteria, as a therapeutic agent among Ghanaian children with diarrhoea, was assessed. Children below 5 years of age coming to Northern Ghana health clinics for treatment of ...
در این پایان نامه، یک الگوریتم جدید برای محاسبه پایه گروبنر پارامتریک از ایده آل چندجمله ای ها با ضرایب پارامتریک ارائه می دهیم. مفهوم پایه گروبنر پارامتریک را می توان یک تعمیمی از پایه گروبنر چندجمله ای ها روی حلقه چندجمله ای ها با ضرایب پارامتریک در نظر گرفت. این تعمیم نقش مهمی را در کاربردها ایفا می کند، مانند هندسه جبری، رباتیک، شبکه های الکتریکی، اثبات قضایای هندسی و غیره. مزیت اصلی ...
We introduce a momentum subtraction scheme which obeys the power counting of Kaplan, Savage, and Wise (KSW), developed for systems with large scattering lengths, a. Unlike the power divergence subtraction scheme, coupling constants in this scheme obey the KSW scaling for all μR > 1/a. We comment on the low-energy theorems derived by Cohen and Hansen. We conclude that there is no obstruction to ...
The current status of effective field theory (EFT) descriptions of nucleon-nucleon (NN) interactions is briefly reviewed, and a new formulation of EFT which treats pion interactions perturba-tively is presented. This approach differs from the Kaplan-Savage-Wise (KSW) expansion in that the singular short distance part of the pion tensor interaction is summed to all orders.
Parity violation in low-energy nuclear observables is included in the pionless effective field theory. The model-independent relation between the parityviolating asymmetry in ~np → dγ and the non-nucleon part of the deuteron anapole moment is discussed. The asymmetry in ~np → dγ computed with KSW power-counting, and recently criticized by Desplanques, is discussed.
Next to leading order effective field theory calculations are performed for S0 NN scattering using subtractive renormalization procedure. One pion exchange and contact interaction potentials are iterated using Lippman-Schwinger equation. Satisfactory fit to the Nijmegen data is obtained for the momenta up to 300 MeV in the centre of mass frame. Phase shifts are also compared with the results of...
We present new related key attacks on the block ciphers WAY Biham DES CAST DES X NewDES RC and TEA Di er ential related key attacks allow both keys and plaintexts to be chosen with speci c di erences KSW Our attacks build on the original work showing how to adapt the general attack to deal with the di culties of the individual algorithms We also give speci c design principles to protect against...
A promising concept for sampling contaminants of emerging concern (CECs) using a home-made Simple Teabag Equilibrium Passive Sampler (STEPS) containing hydrophilic divinylbenzene (h–DVB) sorbent is presented and evaluated application in estuarine systems. The uptake multi-class mixture CECs with broad polarity range (Log P ranging from ?0.1 to 9.9) was investigated static exposure batch experim...
I present the results obtained for several observables in the two-nucleon sector using effective field theory with KSW power-counting and dimensional regularization. In addition to the phase shifts for nucleon-nucleon scattering, several deuteron observables are discussed, including electromagnetic form factors, polarizabilities, γd → γd Compton scattering, and np → dγ. A detailed comparison be...
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