1,915 research outputs found
Multiplanet disc interactions in binary systems
Get PDFWe investigate the evolution of a multiplanet–disc system orbiting one component of a binary star system. The planet–disc system is initially coplanar but misaligned to the binary orbital plane. The planets are assumed to be giants that open gaps in the disc. We first study the role of the disc in shaping the mutual evolution of the two planets using a secular model for low initial tilt. In general, we find that the planets and the disc do not remain coplanar, in agreement with previous work on the single planet case. Instead, the planets and the disc undergo tilt oscillations. A high-mass disc between the two planets causes the planets and the disc to nodally precess at the same average rate but they are generally misaligned. The amplitude of the tilt oscillations between the planets is larger while the disc is present. We then consider higher initial tilts using hydrodynamical simulations and explore the possibility of the formation of eccentric Kozai–Lidov (KL) planets. We find that the inner planet’s orbit undergoes eccentricity growth for a large range of disc masses and initial misalignments. For a low disc mass and large initial misalignment, both planets and the disc can undergo KL oscillations. Furthermore, we find that sufficiently massive discs can cause the inner planet to increase its inclination beyond 90◦ and therefore to orbit the binary in a retrograde fashion. The results have important implications for the explanation of very eccentric planets and retrograde planets observed in multiplanet systems
Pada Notaris Dan Pejabat Pembuat Akta Tanah ( PPAT ) Triniken Tiyas Tirlin, S.H. PROSEDUR PERALIHAN HAK MILIK ATAS TANAH DALAM JUAL BELI
No full textIn practice the implementation of the Job�s authors chose a place in the Field Word Practive Notary and PPAT (Pejabat Pembuat Akta Tanah) Triniken Tiyas Tirlin, S.H., which is located at Jalan Kaliurang Km. 6,3, Sleman, Yogyakarta, on a recommendation by a friend that the Notary Triniken Tiyas Tirlin, S.H., Notary is one of the senior and very professional, it can be seen from the experience of the Triniken Tiyas Tirlin, S.H. working in the field, so i think it would be a lot of knowledge and experience which can be given to the author.
In this final writer lift procedure swiching land ownership in buying and selling, because the authors have based on observations of the author during an internship in the office of the Notary and PPAT Triniken Tiyas Tirlin, S.H. the office very often visited clients who want to enlist the services to be made a deed of agreement buying and selling land in particular. Thus the authors are very interested to learn and understand the procedures and processes of transfer of rights over land for sale.
the TA is the author discusses about the procedur transitional land ownership in the sale and purchase on the understanding that it includes buying and selling, understanding and agreement of sale with the procedures of ground objects began with the issuance of the certificate request to the tranfer of rights
Formation of the polar debris disc around 99 Herculis
Get PDFWe investigate the formation mechanism for the observed nearly polar aligned (perpendicular to the binary orbital plane) debris ring around the eccentric orbit binary 99 Herculis. An initially inclined non-polar debris ring or disc will not remain flat and will not evolve to a polar configuration, due to the effects of differential nodal precession that alter its flat structure. However, a gas disc with embedded well coupled solids around the eccentric binary may evolve to a polar configuration as a result of pressure forces that maintain the disc flatness and as a result of viscous dissipation that allows the disc to increase its tilt. Once the gas disc disperses, the debris disc is in a polar aligned state in which there is little precession. We use three-dimensional hydrodynamical simulations, linear theory, and particle dynamics to study the evolution of a misaligned circumbinary gas disc and explore the effects of the initial disc tilt, mass, and size. We find that for a wide range of parameter space, the polar alignment time-scale is shorter than the lifetime of the gas disc. Using the observed level of alignment of 3◦ from polar, we place an upper limit on the mass of the gas disc of about 0.014 M☉ at the time of gas dispersal. We conclude that the polar debris disc around 99 Her can be explained as the result of an initially moderately inclined gas disc with embedded solids. Such a disc may provide an environment for the formation of polar planets
Author Correction: Long-range chiral exchange interaction in synthetic antiferromagnets
Get PDFIn the version of this Article originally published, the sentence ‘D.-S.H. wrote the paper with K.L., J.H. and M.K.’ in the author contributions was incorrect; it should have read ‘D.-S.H. wrote the paper with K.L., J.H., M.-H.J. and M.K.’ This has been corrected in the online versions of the Article
GAS-DYNAMICS OF SEMIDETACHED BINARIES
No full text[[abstract]]The gas dynamics of semidetached binary systems is analyzed in the context of the Roche model. It is shown that the steady flow can be formulated in terms of a problem with multiple length scales if it is assumed that the contact component rotates synchronously and the flow occurs isothermally with the thermal speed being a small fraction of the relative orbital speed of the two stars. This concept and semianalytical methods are used to demonstrate that material escapes from the surface of the contact component in a highly anisotropic stellar wind, that the wind throttles into a narrow stream of material whose width is a function of the orbital separation and whose density is a function of the mass transfer rate and the relative orbital speed of the two stars, and that the stream results in the formation of a disk of material of prescribed size orbiting the detached component if the latter is smaller than a specified size.
--------------------------------------------------------------------------------[[fileno]]2010118010124[[department]]物理
ON THE STRUCTURE OF CONTACT BINARIES .4. HIGH-MASS MODELS
No full text[[abstract]]Interior models for zero-age contact binaries of high total mass are constructed on the basis of the contact discontinuity hypothesis. The contact discontinuity in systems with a total mass greater than about 4 solar masses is shown to occur on the side of the primary rather than the secondary. Results for two models, one with masses of 4 + 2 solar masses and the other with 8 + 4 solar masses, are presented, along with the properties of the corresponding single stars. These results indicate that the most significant change introduced by the contact configuration is the appearance of a convection zone beneath the contact discontinuity at the Roche lobe of the primary. A proof is given that zero-age main-sequence radiative stars in thermal equilibrium cannot be expanded to fill their Roche lobes in a contact binary.
--------------------------------------------------------------------------------[[fileno]]2010118010115[[department]]物理
A systematic process for generating new blockchain-service business model ideas
No full textAs is the case with other emerging technologies, commercializing blockchain technology via business models can provide radical opportunities for innovation. Existing studies on blockchain-service businesses lack research on how to develop business model ideas systematically; this study proposes a methodical process for generating these new ideas. Blockchain technology features were organized from the perspective of idea generation and leveraged to solve customer requirements. Through workshops, six business ideas were generated and evaluated by 26 experts. The proposed process proved it could generate innovative and qualitative ideas and could, thus, help business planners who are looking to generate new blockchain-service business model ideas. © 2021, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.11Nssciscopu
ON THE STRUCTURE OF CONTACT BINARIES .2. ZERO-AGE MODELS
No full text[[abstract]]Zero-age models of contact binaries of roughly solar composition are constructed on the basis of contact discontinuity hypothesis. With this formulation, systems with common radiative envelopes can be constructed as well as systems with common convective envelopes. Two models with total masses, respectively, of 1.5 and 3 solar masses are presented explicitly; both binary models have a mass ratio chosen equal to 0.5. The properties of the interior structure of these models are compared with the properties of zero-age single stars which have masses corresponding to the individual components. The predictions of the theory are compared with the empirical period-color relationship found by Eggen (1961, 1967) for W Ursae Majoris stars. The agreement with observations is satisfactory.
--------------------------------------------------------------------------------[[fileno]]2010118010119[[department]]物理
MASS, ANGULAR-MOMENTUM, AND ENERGY-TRANSFER IN CLOSE BINARY STARS
No full text[[abstract]]The paper surveys some aspects of the dynamics and energetics of close binary stars which have heretofore not received a detailed review. Attention is directed to those processes of mass, angular momentum, and energy transfer that are thought to have potentially important consequences for the evolutionary history of close binary systems. The presentation, which proceeds mainly along theoretical lines, considers in turn detached binaries, semidetached binaries, and contact binaries.[[fileno]]2010118010107[[department]]物理
PENGENAAN KEWAJIBAN PAJAK DAERAH DAN PPH 23 ATAS JASA KATERING DI RSUD R. SYAMSUDIN S.H.
Get PDFThis Final Project Report was prepared by Angelia Rachel Aiena, Student
Identification Number 2041211011, with the title “IMPOSITION OF LOCAL
TAX OBLIGATIONS AND INCOME TAX 23 ON CATERING SERVICES AT
RSUD R. SYAMSUDIN S.H.” This report is prepared based on the results of
research conducted by the author at RSUD R. Syamsudin S.H. Prior to the issuance
of Law No. 28/2009, catering services were included in the Value Added Tax object.
After the issuance of the Act, catering services have been excluded from the object
of Value Added Tax and are subject to the object of Regional Tax in accordance
with the provisions of Law No. 1 of 2022 concerning Financial Relations between
the Central Government and Regional Governments and are subject to Income Tax
23 in accordance with the provisions of PMK No. 141/PMK.03/2015 concerning
Other types of services as referred to in Article 23 Paragraph (1) Letter C Number
2 of Law Number 7 of 1983 concerning Income Tax. The purpose of this research
is to find out how tax imposition, tax calculation and constraints on eating and
drinking in hospitals. The research method used in this research is a qualitative
research method with a descriptive method so that the results of this research are
based on direct observation through sources with interview, observation, and
documentation methods to find out how the imposition of local taxes and income
tax 23 on catering services at RSUD. R Syamsudin S.H and its constraints and
solutions. As PMK No. 141/PMK.03/2015 explains that Catering Services are
subject to an Income Tax 23 rate of 2% of the gross amount and are subject to local
tax rates as referred to in Law No. 1 of 2022 of 10% of the Tax Imposition Base
(DPP). The results of research at RSUD R. Syamsudin S.H in the imposition of local
tax obligations and Income Tax 23 on catering services are in accordance with
these regulations
- …
