WIMPs search by scintillators: possible strategy for annual modulation search with large-mass highly-radiopure NaI(Tl)

The DAMA experiments are running deep underground in the Gran Sasso National Laboratory. Several interesting results have been achieved so far. Here a maximum likelihood method to search for the WIMP annual modulation signature is discussed and applied to a set of preliminary test data collected with large mass highly radiopure NaI(Tl) detectors. Various related technical arguments are briefly addressed.Comment: 6 pages, 4 figures, LaTex. Contributed paper to TAUP97; to appear in the Proceeding

Heterogeneous Dynamics in Columnar Liquid Crystals of Parallel Hard Rods

In the wake of previous studies on the rattling-and-jumping diffusion in smectic liquid crystal phases of colloidal rods, we analyze here for the first time the heterogeneous dynamics in columnar phases. More specifically, we perform computer simulations to investigate the relaxation dynamics of a binary mixture of perfectly aligned hard spherocylinders. We detect that the columnar arrangement of the system produces free-energy barriers the particles should overcome to jump from one column to another, thus determining a hopping-type diffusion. This phenomenon accounts for the non-Gaussian inter-column diffusion and shows a two-step structural relaxation which is remarkably analogous to that of out-of-equilibrium glass-forming systems and gels. Surprisingly enough, slight deviations from the behavior of simple liquids due to transient cages is also observed in the direction perpendicular to this plane, where the system is usually referred to as liquid-like.Comment: accepted by J Chem Phys; 10 pages, 10 figure

Recovering Metallicity in A4C60: The Case of Monomeric Li4C60

The restoration of metallicity in the high-temperature, cubic phase of Li4C60 represents a remarkable feature for a member of the A4C60 family (A = alkali metal), invariably found to be insulators. Structural and resonance technique investigations on Li4C60 at T > 600 K, show that its fcc structure is associated with a complete (4e) charge transfer to C60 and a sparsely populated Fermi level. These findings not only emphasize the crucial role played by lattice symmetry in fulleride transport properties, but also re-dimension the role of Jahn-Teller effects in band structure determination. Moreover, they suggest the present system as a potential precursor to a new class of superconducting fullerides.Comment: 4 pages, 3 figure

Manajemen Redaksional Tribunpekanbaru.com Dalam Menentukan Berita Yang Layak

News has become a very important requirement for today\u27s society, almost everyone wanted and needed information, a present .In a news portal which would provide a dish worthy news to its readers, not least for the sake TribunPekanbaru.com portal providing information to the public. The quality of the news would be the responsibility of the editor, which is the department that is directly in contact with the news. For that reason, this study aims to determine the editorial management of the news portal TribunPekanbaru.com and how election news..worth..posting. This research applies qualitative method with descriptive approach qualitative in TribunPekanbaru.com news portal, Jalan Sudirman no. 383. Subjects of study include chief editor, journalist coordinator, online coordinator, and one journalists, as well as some of those readers who are determined through purposive method. Data collection techniques used were observation, interview,and.documentation. The results showed first management function on the news portal editor TribunPekanbaru.com in determining a news worthy. TribunPekanbaru.com implement a planning done in a meeting that news content planning meetings, meetings budgeting, and evaluation. As for the organization. TribunPekanbaru.com have determined the distribution of any journalist for news. Then the execution begins from covering news material, gathering, writing, editing news on the website to which of the use of new media. Forms of surveillance that was done TribunPekanbaru.com one of which is the evaluation of the work on monitoring the news items that will be in the post is one application gatekeeper theory, besides TribunPekanbaru.com also open the service to provide criticism and suggestions from the readers of the portal via e-mail. Second, the election news worthy to be posted on the portal is news that meet the elements of decent news is, the news must be accurate, the news must be full, fair and balanced, the news should be objective, the news should be concise and clear, and the news should be warm. The entire series is a form of managerial process done in determining decent news for the community

Komunikasi Politik Anggota Dewan Perwakilan Rakyat Daerah Kota Pekanbaru Fraksi Golkar Periode 2014-2019 dalam Memperoleh Suara (Studi pada Daerah Pemilihan IV)

In the legislative elections that took place in Pekanbaru City in 2014-2019 period the Pekanbaru City House of Representatives held a new legislative election, in which elections were held in many electoral districts, one of them in the electoral district IV (Dapil IV) located in Marpoyan Damai sub-district and Bukit Raya, from the number of party factions participating in the legislative elections of the Golkar faction were the ones who got the most votes. Golkar faction get the most votes for 7 seats of member of Dpril which divided in Dapil I, Dapil II, Dapil III, Dapil IV, and Dapil V from each Dapil. Dapil IV is the first highest voice of Golkar faction, Drs. H. Tarmizi Muhammad and the third highest voice of the Golkar faction, Mr. H. Herwan Nasri, S.T.This study uses descriptive analysis with qualitative approach, where data collected in the form of words, images and not the numbers. the selection of informants was done by purposive sampling technique by placing the people directly related to DPRD Member of Pekanbaru City Golkar Faction H. Herwan Nasri, S.T and Mr. Drs. H. Tarmizi Muhammad.Based on the results of field research that researchers do produce conclusions Political Communication member DPRD Pekanbaru Golkar Faction In the process of political communication in addition to closer to the community, convey political messages that will affect the audience with political messages delivered, convincing people with vision- mission that has been done before the political communication process. In the process of political communication is measured through several indicators of political communication process involving good communication elements with the community, successful teams, parties and journalists as well as elements of print, online and social media

Unusual polymerization in the Li4C60 fulleride

Li4C60, one of the best representatives of lithium intercalated fullerides, features a novel type of 2D polymerization. Extensive investigations, including laboratory x-ray and synchrotron radiation diffraction, 13C NMR, MAS and Raman spectroscopy, show a monoclinic I2/m structure, characterized by chains of [2+2]-cycloaddicted fullerenes, sideways connected by single C-C bonds. This leads to the formation of polymeric layers, whose insulating nature, deduced from the NMR and Raman spectra, denotes the complete localization of the electrons involved in the covalent bonds.Comment: 7 pages, 6 figures, RevTex4, submitted to Phys. Rev.

Financial maturity concepts with application to three hardwood timber stands

Timber is “financially mature” when its rate of value increase falls below what the landowner can earn in alternative investments that are comparable in duration, risk, liquidity, and other factors. The basic concept of financial maturity is simple, but in application it involves several very important, basic questions and issues

Optimization and Portability of a Fusion OpenACC-based FORTRAN HPC Code from NVIDIA to AMD GPUs

NVIDIA has been the main provider of GPU hardware in HPC systems for over a decade. Most applications that benefit from GPUs have thus been developed and optimized for the NVIDIA software stack. Recent exascale HPC systems are, however, introducing GPUs from other vendors, e.g. with the AMD GPU-based OLCF Frontier system just becoming available. AMD GPUs cannot be directly accessed using the NVIDIA software stack, and require a porting effort by the application developers. This paper provides an overview of our experience porting and optimizing the CGYRO code, a widely-used fusion simulation tool based on FORTRAN with OpenACC-based GPU acceleration. While the porting from the NVIDIA compilers was relatively straightforward using the CRAY compilers on the AMD systems, the performance optimization required more fine-tuning. In the optimization effort, we uncovered code sections that had performed well on NVIDIA GPUs, but were unexpectedly slow on AMD GPUs. After AMD-targeted code optimizations, performance on AMD GPUs has increased to meet our expectations. Modest speed improvements were also seen on NVIDIA GPUs, which was an unexpected benefit of this exercise.Comment: 6 pages, 4 figures, 2 tables, To be published in Proceedings of PEARC2

Final results of an experiment to search for 2beta processes in zinc and tungsten with the help of radiopure ZnWO4 crystal scintillators

A search for the double beta decay of zinc and tungsten isotopes has been performed with the help of radiopure ZnWO4 crystal scintillators (0.1-0.7 kg) at the Gran Sasso National Laboratories of the INFN. The total exposure of the low background measurements is 0.529 kg yr. New improved half-life limits on the double beta decay modes of 64Zn, 70Zn, 180W, and 186W have been established at the level of 10^{18}-10^{21} yr. In particular, limits on double electron capture and electron capture with positron emission in 64Zn have been set: T_{1/2}(2\nu 2K) > 1.1 10^{19} yr, T_{1/2} (0\nu 2\epsilon) > 3.2 10^{20} yr, T_{1/2} (2\nu \epsilon \beta^+) > 9.4 10^{20} yr, and T_{1/2} (0\nu \epsilon \beta^+) > 8.5 10^{20} yr, all at 90% C.L. Resonant neutrinoless double electron capture in 180W has been restricted on the level of T_{1/2} (0\nu 2\epsilon) > 1.3 10^{18} yr. A new half-life limit on alpha transition of 183W to the metastable excited level 1/2^- 375 keV of 179Hf has been established: T_{1/2} > 6.7 10^{20} yr.Comment: This is an author-created, un-copyedited version of an article published in J. Phys. G: Nucl. Part. Phys. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The definitive publisher authenticated version is available online at doi: 10.1088/0954-3899/38/11/11510