A Case Study of OpenMP applied to Map/Reduce-style Computations

As data analytics are growing in importance they are also quickly becoming one of the dominant application domains that require parallel processing. This paper investigates the applicability of OpenMP, the dominant shared-memory parallel programming model in high-performance computing, to the domain of data analytics. We contrast the performance and programmability of key data analytics benchmarks against Phoenix++, a state-of-the-art shared memory map/reduce programming system. Our study shows that OpenMP outperforms the Phoenix++ system by a large margin for several benchmarks. In other cases, however, the programming model is lacking support for this application domain.

Substance Use and Misuse : Adolescent Substance Use in the context of the family ; a qualitative study of young people's views on parent child attachments , parenting style and parental substance use

Introduction and Aims. While the role of the family in adolescent substance use has been well documented, few studies have attempted to explore in-depth youth perceptions of how these familial processes/dynamics influence teenage substance use. This paper reports the findings from a study exploring risk and protective factors for teenage substance use within the context of the family as perceived by young people with a view to informing current and future family based prevention and education interventions.
Design and Methods. Data collection took place in nine post-primary schools across Northern Ireland. Nine focus groups using participatory techniques were facilitated with a purposive sample of sixty-two young people (age 13-17 years). Data were transcribed verbatim and analysed using a content/thematic analysis.
Results. Three broad themes/aspects of the family emerged from the data, which may serve to protect or attenuate the risk of substance use among young people. Parent-child attachment was a major theme identified in protecting adolescents from substance use in addition to effective parenting particularly an authoritative style of parenting supplemented by parental monitoring and good parent-child communication to encourage child disclosure. Family substance use was deemed to impact on children’s substance use if exposed at an early age and the harms associated with PSM were discussed in detail.
Discussion and Conclusions. The qualitative approach provides insight into current understanding of youth perceptions of substance use in the context of family dynamics. A number of recommendations are outlined. Family based (preventive) interventions/parenting programmes may benefit from components on effective parenting including authoritative styles, parental monitoring, effective communication, spending time together (building attachments), parent-child conflict, adolescent development and factors which impact on parenting. Parenting programmes tailored to mothers and fathers may be beneficial. School based interventions targeting children/adolescents may be best placed to target children living with parental substance misuse.
Keywords: substance/substance related disorders, focus groups, young people/adolescent,

Adolescent substance use in the context of the family: a qualitative study of young people’s views on parent-child attachments, parenting style and parental substance use

Background: Adolescent substance use can place youth at risk of a range of poor outcomes. Few studies have attempted to explore in-depth young people’s perceptions of how familial processes and dynamics influence adolescent substance use.
Objectives: This paper aimed to explore risk and protective factors for youth substance use within the context of the family with a view to informing family based interventions.
Methods: Nine focus groups supplemented with participatory techniques were facilitated with a purposive sample of sixty-two young people (age 13-17 years) from post-primary schools across Northern Ireland. The data were transcribed verbatim and analysed using thematic analysis.
Results: Three themes emerged from the data: 1) parent-child attachments, 2) parenting style and 3) parental and sibling substance misuse. Parent-child attachment was identified as an important factor in protecting adolescents from substance use in addition to effective parenting particularly an authoritative style supplemented with parental monitoring and strong parent-child communication to encourage child disclosure. Family substance use was considered to impact on children’s substance use if exposed at an early age and the harms associated with parental substance misuse were discussed in detail. Both parent and child gender differences were cross-cutting themes.
Conclusion: Parenting programmes (tailored to mothers and fathers) may benefit young people via components on authoritative styles, parental monitoring, communication, nurturing attachments and parent-child conflict. Youth living with more complex issues, e.g. parental substance misuse, may benefit from programmes delivered beyond the family environment e.g. school based settings.

Photoionization of Costyle="margin: 0px; padding: 0px; border: 0px; outline-style: none; font-weight: inherit; font-style: inherit; font-size: 0.85em; font-family: inherit; line-height: 0; text-align: inherit;">+ and electron-impact excitation of Costyle="margin: 0px; padding: 0px; border: 0px; outline-style: none; font-weight: inherit; font-style: inherit; font-size: 0.85em; font-family: inherit; line-height: 0; text-align: inherit;">2 + using the Dirac style="margin: 0px; padding: 0px; border: 0px; outline-style: none; font-weight: inherit; font-size: inherit; font-family: inherit; line-height: inherit; text-align: inherit; vertical-align: baseline;">R-matrix method

Modelling of massive stars and supernovae (SNe) plays a crucial role in understanding galaxies. From this modelling we can derive fundamental constraints on stellar evolution, mass-loss processes, mixing, and the products of nucleosynthesis. Proper account must be taken of all important processes that populate and depopulate the levels (collisional excitation, de-excitation, ionization, recombination, photoionization, bound–bound processes). For the analysis of Type Ia SNe and core collapse SNe (Types Ib, Ic and II) Fe group elements are particularly important. Unfortunately little data is currently available and most noticeably absent are the photoionization cross-sections for the Fe-peaks which have high abundances in SNe. Important interactions for both photoionization and electron-impact excitation are calculated using the relativistic Dirac atomic style="margin: 0px; padding: 0px; border: 0px; outline-style: none; font-size: 14px; font-family: "Lucida Grande", "Lucida Sans Unicode", Tahoma, Verdana, Arial, Helvetica, sans-serif; line-height: inherit; vertical-align: baseline; background-color: rgb(255, 255, 255);">R-matrix codes (DARC) for low-ionization stages of Cobalt. All results are calculated up to photon energies of 45 eV and electron energies up to 20 eV. The wavefunction representation of Co III has been generated using GRASP0 by including the dominant 3d^{style="margin: 0px; padding: 0px; border: 0px; outline-style: none; font-size: 0.85em; font-family: "Lucida Grande", "Lucida Sans Unicode", Tahoma, Verdana, Arial, Helvetica, sans-serif; line-height: 0; background-color: rgb(255, 255, 255);">7}, 3d^{style="margin: 0px; padding: 0px; border: 0px; outline-style: none; font-size: 0.85em; font-family: "Lucida Grande", "Lucida Sans Unicode", Tahoma, Verdana, Arial, Helvetica, sans-serif; line-height: 0; background-color: rgb(255, 255, 255);">6}[4s, 4p], 3p^{style="margin: 0px; padding: 0px; border: 0px; outline-style: none; font-size: 0.85em; font-family: "Lucida Grande", "Lucida Sans Unicode", Tahoma, Verdana, Arial, Helvetica, sans-serif; line-height: 0; background-color: rgb(255, 255, 255);">4}3d^{style="margin: 0px; padding: 0px; border: 0px; outline-style: none; font-size: 0.85em; font-family: "Lucida Grande", "Lucida Sans Unicode", Tahoma, Verdana, Arial, Helvetica, sans-serif; line-height: 0; background-color: rgb(255, 255, 255);">9} and 3p^{style="margin: 0px; padding: 0px; border: 0px; outline-style: none; font-size: 0.85em; font-family: "Lucida Grande", "Lucida Sans Unicode", Tahoma, Verdana, Arial, Helvetica, sans-serif; line-height: 0; background-color: rgb(255, 255, 255);">6}3d^{style="margin: 0px; padding: 0px; border: 0px; outline-style: none; font-size: 0.85em; font-family: "Lucida Grande", "Lucida Sans Unicode", Tahoma, Verdana, Arial, Helvetica, sans-serif; line-height: 0; background-color: rgb(255, 255, 255);">9} configurations, resulting in 292 fine structure levels. Electron-impact collision strengths and Maxwellian averaged effective collision strengths across a wide range of astrophysically relevant temperatures are computed for Co III. In addition, statistically weighted level-resolved ground and metastable photoionization cross-sections are presented for Co II and compared directly with existing work.