Pseudorapidity dependence of parton energy loss in relativistic heavy ion collisions

We analyze the recent data from the BRAHMS Collaboration on the pseudorapidity dependence of nuclear modification factors in Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV by using the full three dimensional hydrodynamic simulations for the density effects on parton energy loss. We first compute the transverse spectra at $\eta=0$ and 2.2, and next take a ratio $R_{\eta}=R_{AA}(\eta=2.2)/R_{AA}(\eta=0)$, where $R_{AA}$ is a nuclear modification factor. It is shown that hydrodynamic components account for $R_{\eta}\simeq 1$ at low $p_\mathrm{T}$ and that quenched pQCD components lead $R_{\eta} < 1$ at high $p_\mathrm{T}$ which are consistent with the data. Strong suppression at $\eta=2.2$ is compatible with the parton energy loss in the final state.Comment: 5 pages, 4 figures; one figure adde

Mathematics, Science and Technology Education: Their Place in the Nigeria National Transformation Agenda

ABSTRACT Mathematics, Science and Technology Education is indisputably recognised worldwide as essential tools for effecting national development. The developed economies of the world such as Japan, China, Germany and United State of America (U.S.A) have always accorded mathematics, science and technology high priority to the extent that 10% of their enormous Gross National Product (GNP) is spent on science and technology. In Nigeria however, in spite of the proliferation of universities, polytechnics and research institutes, less than 1% of GNP is budgeted for funding of science and technology. Hence, the transformation agenda of the Nigerian Government and its Vision 20:2020 would be a mirage except mathematics, science and technology takes the central and leadership role as the major driver of the nation&apos;s program. It is based on this that the research is focused on the implication of mathematics, science and technology on the national transformation agenda of the Federal Government of Nigeria. The research also highlights some missing links on how mathematics, science and technology can transform the economy and the challenges of the opportunity of using the skills and knowledge acquired in Mathematics, Science and Technology to bring about the most needed scientific and technological growth in Nigeria. The research recommends among others that the Nigerian Government should adequately fund mathematics, science and technology programs and research in higher institutions. The research concludes that the federal government should make it mandatory for the industrial sector to join international bodies in order to facilitate scientific and technological development by commercializing research results in mathematics, science and technology

Comparison of space-time evolutions of hot/dense matter in sNN\sqrt{s_{NN}}=17 and 130 GeV relativistic heavy ion collisions based on a hydrodynamical model

Based on a hydrodynamical model, we compare 130 GeV/$A$ Au+Au collisions at RHIC and 17 GeV/$A$ Pb+Pb collisions at SPS. The model well reproduces the single-particle distributions of both RHIC and SPS. The numerical solution indicates that huge amount of collision energy in RHIC is mainly used to produce a large extent of hot fluid rather than to make a high temperature matter; longitudinal extent of the hot fluid in RHIC is much larger than that of SPS and initial energy density of the fluid is only 5% higher than the one in SPS. The solution well describes the HBT radii at SPS energy but shows some deviations from the ones at RHIC.Comment: 28 pages, 21 figures, REVTeX4, one figure is added and some figures are replace

A system for quantitative analysis of associative learning. 1. Hardware interfaces with cross-species applications

Abstract Microcomputer software was designed and used to control the timing and delivery of sensory stimuli and to acquire and analyze behavioral data during classical conditioning experiments. The software package runs under DOS 4.x through 6.x (earlier versions run under DOS 3.x) on PC AT-compatible microcomputers coupled with appropriate interface hardware (se

Determinants of antiretroviral treatment adherence among patients attending secondary health care facilities in north-east and south-west Nigeria: a comparative study

Background: Four decades after its discovery, HIV continues to be a major global public health issue, even with antiretroviral therapy (ART). Strict adherence to ART remains a challenge, with attendant implications for treatment success. This study aimed at comparing ART adherence between north-east and south-west Nigeria.Methods: A comparative cross-sectional study was conducted in two regions in Nigeria among 400 HIV/AIDS patients on ART. Data were collected using a pre-tested, semi-structured interviewer-administered questionnaire. Multivariable analysis was performed to determine predictors of ART adherence in the regions. The level of significance was set at 0.05.Results: The majority of respondents from both the north-east (87.5%) and south-west (92.5%) of Nigeria had good knowledge about ART. The self-reported adherence level was 90.0% in the north-east and 87.5% in the south-west. Predictors of ART adherence in the north-east were knowledge about ART (AOR 9.949; 95% CI 2.009–49.284) and transport costs to the clinic (AOR 0.177; 95% CI 0.047–0.661). In the south-west, education (AOR 0.198; 95% CI 0.047–0.832) and knowledge of ART (AOR 8.945; 95% CI 1.749–45.751) were identified as predictors of ART adherence.Conclusion: In both regions, knowledge about ART was appreciable, but adherence was sub-optimal. Strategies to support adherence should be tailored to specific predictors in each region

The risk reduction of recurrent periodontal pathogens of local application minocycline HCl 2% gel, used as an adjunct to scaling and root planing for chronic periodontitis treatment

Y Soeroso,1,2 T Akase,3 H Sunarto,1,2 Y Kemal,1 R Salim,1 M Octavia,1 A Viandita,1 J Setiawan,1 BM Bachtiar2,4 1Department of Periodontology, Faculty of Dentistry, Universitas Indonesia, Jakarta, Indonesia; 2Oral Sciences Research Center, Universitas Indonesia, Jakarta, Indonesia; 3R&amp;D, Oral Care Company, Sunstar Group, Takatsuki City, Japan; 4Department of Oral Biology, Faculty of Dentistry, Universitas Indonesia, Jakarta, Indonesia Background: The aim of this study was to evaluate the clinical and microbiological effects of local application minocycline HCl 2% gel, used as an adjunct to scaling and root planing (SRP) for treatment of chronic periodontitis (CP). CP is an inflammation of periodontal tissue that is caused mainly by bacterial infection, where periodontal destruction such as loss of attachment and bone destruction occurred. Methods: A total of 81 subjects with moderate to severe periodontitis whose baseline clinical attachment loss (CAL) was &ge;4 mm were randomly assigned to receive SRP alone (control group, N=39) or SRP followed by four times of local application of minocycline HCl gel (Periocline) once a week (test group, N=42). Pocket depth, CAL, and papilla bleeding index were examined at baseline, 21 days, 2, 3, and 6 months. Subgingival plaque samples were collected with sterile curettes and were analyzed by real-time polymerase chain reaction for the presence of three periodontal pathogens (Porphyromonas gingivalis [P.g.], Tannerella forsythia [T.f.], and Treponema denticola [T.d.]) at baseline, 2, 3, and 6 months. Results: The number of bacteria was reduced in both groups at 2 months after baseline (SRP treatment). The changes (2&ndash;6 months) in T.d. and T.f. counts in the test group were significantly lower than those in the control group. In the control group, a significant regrowth of P.g., T.f., and T.d. was observed from 2 to 6 months and of P.g. and T.f. from 3 to 6 months. On the other hand, in the test group, the number of the three bacteria did not significantly increase during the 6-month period. Conclusion: The results showed that local application of minocycline, used as an adjunct to SRP, was effective for suppressing regrowth of periodontal pathogens, suggesting its risk reduction of recurrent periodontal pathogens in CP. Keywords: chronic periodontitis, minocycline, scaling and root planing, real-time PCR, periodontal pathoge