The null divergence factor [PDF]
Publicacions Matemàtiques, 1997 Let (P,Q) be a C1 vectorfield defined in a open subset U ⊂ R2. We call a null divergence factor a C1 solution V (x, y) of the equation P ∂V ∂x + Q∂V ∂y = ∂P ∂x + ∂Q ∂y V . In previous works it has been shown that this function plays a fundamental role in the problem of the center and in the determination of the limit cycles.
Chavarriga, J., Giacomini, H., Giné, J.
openaire +5 more sources
On the Relationship between Two Notions of Compatibility for Bi-Hamiltonian Systems [PDF]
, 2010 Bi-Hamiltonian structures are of great importance in the theory of integrable Hamiltonian systems. The notion of compatibility of symplectic structures is a key aspect of bi-Hamiltonian systems.
Manuele Santoprete, null null
core +7 more sources
A Syntactic Analysis of Ergative Case Marking in some Iranian Languages: A minimalist View [PDF]
زبان پژوهی, 2019 Tatic-type languages are among west Iranian languages divided into four main groups: northern Tatic, central Tatic, southern Tatic and Taleshi group (Stilo, 1981, p. 139).
Ifa Shafai, Mohammad Dabirmoghaddam
doaj +1 more source
Heavy Flavor Production at PHENIX at RHIC [PDF]
, 2006 A study of heavy flavor production in different collision systems in various kinematic regions presents an opportunity to probe cold nuclear medium and hot dense matter effects.
null null, Xiaorong Wang
core +3 more sources
The effect of thermal stresses on the immune system of the potato tuber moth, Phthorimaea operculella (Lepidoptera: Gelechiidae) [PDF]
نامه انجمن حشره‌شناسی ایران, 2018 The hemocytes of insects are one of important components of immune system of insects against various stresses such as pathogens attack, parasitoids, starvation period and temperature changes.
z. Pourali, Maryam Ajam Hassani
doaj +1 more source
Mesons in the nuclear Medium [PDF]
, 2006 We discuss recent experimental results on the modification of hadron properties in a nuclear medium. Particular emphasis is placed on an $\omega$ production experiment performed by the CBELSA/TAPS collaboration at the ELSA accelerator.
Martin Kotulla, null null
core +3 more sources
Assessment of Behavior Factor for Steel Plate Shear Wall with Reinforced Concrete Moment Surrounded Frame [PDF]
Journal of Structural and Construction Engineering, 2019 The steel shear wall is an appropriate resistant system against lateral loads that is been utilized in modern high-rise buildings and upgrading existing buildings because of numerous benefits.
Madjid Gholhaki +2 more
doaj +1 more source
Hadron Blind Detector for the PHENIX Experiment at RHIC [PDF]
, 2006 The PHENIX collaboration has designed a conceptually new Hadron Blind Detector (HBD) for electron identification in high density hadron environment. The HBD will identify low momentum electron-positron pairs to reduce the combinatorial background in the ...
A. Milov, null null
core +2 more sources
تأثیر امواج فراصوت بر جوانه‌زنی، فعالیت آنزیم‌های آلفا‌آمیلاز و آنتی‌اکسیدان، قند‌ها و کلروفیل در سرخارگل [PDF]
Pizhūhish/hā-yi tulīd-i giyāhī, 2019 سابقه و هدف: جوانه‌زنی سریع، یکنواخت و کامل بذر‌ها باعث سبز شدن مطلوب و رشد اولیه‌ی سریع گیاه می‌شود. رشد اولیه‌ی مطلوب سبب دریافت بیشتر تشعشع خورشیدی و افزایش عملکرد می‌گردد. جوانه‌زنی بذور سرخارگل کم و نامنظم می‌باشد.
سیده فاطمه رسولی +3 more
doaj +1 more source
A Pilot Study of Nulling in 22 Pulsars Using Mixture Modeling [PDF]
, 2023 The phenomenon of pulsar nulling, observed as the temporary inactivity of a pulsar, remains poorly understood both observationally and theoretically. Most observational studies that quantify nulling employ a variant of Ritchings (1976)'s algorithm which can suffer significant biases for pulsars where the emission is weak.
arxiv +1 more source