On the phase-space structure of the Milky Way dark-matter halo

We analyse a high resolution simulation of the formation of a cluster's dark-matter halo in a $\Lambda$CDM cosmology (Springel et al. 2001). The resolution achieved allows us to map the phase-space structure in detail, and characterize its evolution and degree of lumpiness. Scaling down the cluster halo to a Milky-Way size halo, we probe the substructure expected in the solar neighbourhood. Here we specifically address the relevance of such substructure for direct detection experiments aimed at determining the nature of dark-matter.Comment: 4 pages, 5 figures, uses dunk2001_asp.sty, to appear in "The Dynamics, Structure and History of Galaxies: A Workshop in Honour of Prof. Ken Freeman", (eds) G. S. Da Costa & E. M. Sadler, ASP Conf Serie

POLA PENALARAN FISIKA PESERTA DIDIK SMA DALAM MEMAJUKAN RUMAH TERAPUNG DI DANAU TEMPE

Penelitian ini adalah penelitian kualitatif jenis fenomenografi. Penelitian ini bertujuan untuk mengetahui pola penalaran fisika peserta didik SMA dalam memajukan rumah terapung di danau tempe.  LKPD yang dirancang merujuk pada kearifan lokal di Wajo dengan objek “ Rumah Terapung di danau Tempe”. Subjek dalam penelitian ini adalah peserta didik kelas XI MIPA SMA Negeri 4 Wajo yang menyukai mata pelajaran fisika dan erat kaitannya dengan mata pelajaran IPA yang lain dan pernah berkunjung ke rumah terapung di danau Tempe. Pengumpulan data dilakukan melalui observasi, tes tulis, wawancara dan dokumentasi. Data hasil penelitian diperoleh melalui tes tulis dan dianalisis secara kualitatif. Hasil penelitian menunjukkan bahwa peserta didik mampu bernalar dan menggunakan pola penalaran deduktif dan induktif.

Konsep Keadilan Dalam Filsafat Hukum Dan Filsafat Hukum Islam

This paper compares the concept of justice in the viewpoint of legal philosophy and the philosophy of Islamic law. Justice in Islamic law comes from the Creator, Allah Swt., which is infinite justice and therefore must be believed not to apply the law unless justice to His servants. The concept of Justice will continue to evolve in line with social development. Fairness in life becomes an important requirement for humans so that everyone can strike a balance between demanding their rights and carrying out their obligations in an effort to reach the truth. Thus, the truth and the obligations must be in harmony and balance in life. Law is just a collection of words when the law does not materialize justice. When a law does not recognize justice, it is meaningless. Law formulation, therefore, is the process of harmonizing legal certainty and proportionality

Ketiadaan Daluwarsa Penuntutan Dalam Hukum Pidana Islam Dan Pembaruan Hukum Pidana Di Indonesia

A statute of limitation is the passage of specified number of years that become the reason for abolishing of criminal penalties against someone who has committed a criminal act. Basically, all the perpetrators of criminal acts should be prosecuted in a criminal court to face trial, but there are things which abolish criminal prosecution such as the statute of limitation. In order to reform the criminal law, it must necessarily be carried out by reconstructing underlying ideas of such reformation, that is the materialization of justice. One of the ways to do so is by including the concept of absence of the statute of limitation as adopted by the concept of Islamic criminal law. This paper argues that the statute of limitation enshrined in the Criminal Code gives more emphasis on the rule of law, while the absence of the statute of limitation in the Islamic Criminal Law give more emphasis on the fairness and certainty. Achieving justice is not limited by time; whereas certainty is limited by the availability of valid evidence. To that end, the introduction of the concept of absence of statute of limitation into positive law is necessary to ensure that justice which is the main purpose of law enforcement. In addition, the introduction of this Islamic criminal law concept is also a strategic move to make Islamic law a part of the positive law in Indonesia

The low mass end of the neutral gas mass and velocity width functions of galaxies in Λ\LambdaCDM

We use the high-resolution Aquarius cosmological dark matter simulations coupled to the semi-analytic model by Starkenburg et al. (2013) to study the HI content and velocity width properties of field galaxies at the low mass end in the context of $\Lambda$CDM. We compare our predictions to the observed ALFALFA survey HI mass and velocity width functions, and find very good agreement without fine-tuning, when considering central galaxies. Furthermore, the properties of the dark matter halos hosting galaxies, characterised by their peak velocity and circular velocity at 2 radial disk scalelengths overlap perfectly with the inferred values from observations. This suggests that our galaxies are placed in the right dark matter halos, and consequently at face value, we do not find any discrepancy with the predictions from the $\Lambda$CDM model. Our analysis indicates that previous tensions, apparent when using abundance matching models, arise because this technique cannot be straightforwardly applied for objects with masses $M_{vir} < 10^{10} M_{\odot}$.Comment: Accepted for publication in MNRAS, 9 pages, 8 figure

The phase-space structure of cold dark-matter halos: Insights into the Galactic halo

We study the formation of the Milky Way's halo in a $\Lambda$CDM cosmology by scaling down a high resolution simulation of the formation of a cluster of galaxies. We determine how much phase-space substructure is left over from the objects that merge to build up the present galaxy. We study the debris streams originating from such objects and find that their evolution can be explained simply in terms of the conservation of phase-space density. Analysing the mass growth history of our halo we find that its inner regions have been in place for more than 10 Gyr, but that the growth of the halo as a whole is more gradual, in agreement with other high resolution simulations of dark-matter halos. Recent accretion contributes to the inner 10 kpc of the halo only at the 10$^{-4}$ level. Finally we determine the number of dark-matter streams as a function of distance from the centre of the halo. In the equivalent of the ``Solar vicinity'', we find that the dark-matter is smoothly distributed in space, and that the velocity ellipsoid is formed by hundreds of thousands of streams, most of which have velocity dispersions of the order of 1 km/s or less.Comment: 16 pages, 21 figures, MNRAS in press. Postscript version with high resolution figures available from http://www.mpa-garching.mpg.de/~ahelmi/research/lcdm_cl.html. Minor change

Penerapan Azas Equality Before The Law dalam Sistem Peradilan Militer

Implementation of Equality Before The Law principle in Military Court System. One of Law State concept is A free an neutral judicial. Supreme Court is the highest Court , institution that conduct law enforcement within judicial competency, including Military Court. New Order Era had an immense authority to place a Military as a special citizen. It leads to military supremacy towards civilian. It was reflected by special rights attributed to Military. As a result, Military Court is perceived as to a nationality principle and equality before the law principle. It then influences our quality of democracy. Keywords: equality before the law principle, Military Court SystemDOI: 10.15408/jch.v1i2.299