Speech Processing to Improve the Perception of Speech in Background Noise for Children With Auditory Processing Disorder and Typically Developing Peers.

Auditory processing disorder (APD) may be diagnosed when a child has listening difficulties but has normal audiometric thresholds. For adults with normal hearing and with mild-to-moderate hearing impairment, an algorithm called spectral shaping with dynamic range compression (SSDRC) has been shown to increase the intelligibility of speech when background noise is added after the processing. Here, we assessed the effect of such processing using 8 children with APD and 10 age-matched control children. The loudness of the processed and unprocessed sentences was matched using a loudness model. The task was to repeat back sentences produced by a female speaker when presented with either speech-shaped noise (SSN) or a male competing speaker (CS) at two signal-to-background ratios (SBRs). Speech identification was significantly better with SSDRC processing than without, for both groups. The benefit of SSDRC processing was greater for the SSN than for the CS background. For the SSN, scores were similar for the two groups at both SBRs. For the CS, the APD group performed significantly more poorly than the control group. The overall improvement produced by SSDRC processing could be useful for enhancing communication in a classroom where the teacher's voice is broadcast using a wireless system

Ireland’s unseen majority – microbial diversity of the seabed

Despite their size, prokaryote (bacteria and archaea) biomass is estimated to represent between 15 and 30% of total living biomass1,2. Prokaryotes play major roles in marine ecosystems and in global biogeochemical cycling3,4. Molecular phylogenetic approaches have revolutionised microbiology and have revealed that the complexity of microbial life is orders of magnitude greater than previous estimates based on cultivation-based approaches5. This highlights how little we currently know about the microbial world and the clear potential of this vast untapped resource for human application. Here we present the first in-depth analysis of microbial community diversity and composition in the Irish Sea. The western Irish Sea is characterised by distinct hydrographic conditions, resulting in summer stratified offshore deeper waters and settling of fine mud, while well-mixed waters and coarser sediment type dominate in the south and coastal regions. We wished to assess whether these factors play a role in prokaryote abundance and diversity

Hydrographic controls on marine organic matter fate and microbial diversity in the western Irish Sea

Cycling of organic matter (OM) is the key biological process in the marine environment and knowledge of the sources and the reactivity of OM, in addition to factors controlling its distribution in estuarine, coastal and shelf sediments are of key importance for understanding global biogeochemical cycles. With recent advances in cultivation-independent molecular approaches to microbial ecology, the key role of prokaryotes in global biogeochemical cycling in marine ecosystems has been emphasised. However, spatial studies combining the distribution and fate of OM with microbial community abundance and diversity remain rare. Here, a combined spatial lipid biomarker and 16S rRNA tagged pyrosequencing study was conducted in surface sediments and particulate matter across hydrographically distinct zones associated with the seasonal western Irish Sea gyre. The aim was to assess the spatial variation of, and factors controlling, marine organic cycling and sedimentary microbial communities across these distinct zones. The distribution of phospholipid fatty acids, source-specific sterols, wax esters and C25 highly branched isoprenoids indicate that diatoms, dinoflagellates and green algae were the major contributors of marine organic matter, while the distribution of cholesterol, wax esters and C20 and C22 polyunsaturated fatty acids have highlighted the importance of copepod grazing for mineralizing organic matter in the water column5. This marine OM production and mineralisation was greatest in well-mixed waters compared to offshore stratified waters. Lipid analysis and 16S rRNA PCR-DGGE profiling also suggests that sedimentary bacterial abundance increases while community diversity decreases in offshore stratified waters. The major bacterial classes are the Deltaproteobacteria, Clostridia, Flavobacteriia, Gammaproteobactera and Bacteroiidia. At the family/genus level most groups appear to be associated with organoheterotrophic processing of sedimentary OM, ranging from degradation of complex organic matter (e.g. Tepidibacter sp.) to sulfur-dependent utilisation of simple organic molecules (e.g. Desulfobulbaceae and Desulfuromonadaceae)

The Effect of Minority Preferences on the White Applicant: A Misplaced Consensus?

In recent years, a consensus has developed among both affirmative action's advocates and opponents that in relation to the typical white applicant, the effects of minority preferencing are minimal. In this essay, the aim is to clarify the mathematics of affirmative action's impact on majority applicants, and to flag the distinction between that question and affirmative action's opportunity cost. First, the essay establishes the level of agreement among judges and academics on the triviality of affirmative action's effect on the regular white applicant's prospects of success. Second, it demonstrates how the prevailing position on the impact of minority preferencing on the white applicant is flawed - as regards both the calculation of relative admission likelihood and the application of the matriculant yield variable. Making use of a number of case studies reviewed in the literature, it shows how those studies, properly understood, convey a rather different picture of the arithmetic of minority preferencing. The essay concludes by challenging the tendency to take the effects of affirmative action (on both preferred and non-preferred applicants) as exclusively indicative of its costs

Judicial Globalization and Perceptions of Disagreement: Two Surveys

Using data from a 2011 judicial survey that drew responses from the entire New Zealand Supreme Court, I model the Court’s practice of transnational argument. The data suggest that whereas foreign law often appears to contribute to the Court’s legal conclusions, at times its contribution derives from an associated social reward, and at others is flatly illusory. I argue that these findings, in tandem with those of the larger survey, indicate that the law reports systematically misrepresent all judicial disagreement as legal disagreement, thus lending support to the claim that in controversial cases, the law is indeterminate

Scalia, Hamdan and the Principles of Subject Matter Recusal

Despite its moral immediacy, there are serious theoretical objections, best described as "realist," to an expansive conception of judicial open-mindedness. Almost invariably, the normative basis of judicial impartiality is traced to what is described as "natural justice"; specifically the celebrated maxims of nemo iudex in causa sua and audi alteram partem. But the relationship of this moral bedrock to the exigencies and settled practices of constitutional adjudication is far from straightforward. In Part I, the article proceeds with a doctrinal analysis of the legality of Justice Antonin Scalia's decision to sit in the case of Hamdan v. Rumsfeld notwithstanding his prior comments on legal questions ostensibly related to its subject matter. Taking a broader perspective, Part II considers whether objections to Justice Scalia's participation in Hamdan can be reconciled with the nature of appellate adjudication and, in relation to dissenting opinions, with an established feature of adjudicative practice in most common law jurisdictions