193 research outputs found
The Genre of Genesis One
Though there have been many recent attempts to redefine the narrative of Genesis 1:1-2:4a as prophecy or poetry, thus lessening the literalness of that passageβs terminology, such attempts fail to be conclusive or even plausible in the light of genre analysis. Even more recent attempts to declare the passage a special creation genre, not to be taken literally and also unique in both Scripture and in the milieu of the ancient near East, likewise fail in view of the non-existence of documentable literary parallels. It is therefore to be interpreted within the genre in which it best fits, that of historical narrative
Blotting Out and Breaking Up: Miscellaneous Hebrew Studies in Geocatastrophism
The blotting out of Gen. 6:7, 7:4, and 7:23 and the bursting open of the fountains of the great deep were examined to determine what constraints these passages place on Flood models. The use of maha (translated blot out ) throughout Scripture, and the theology of the blotting out of sin argue rather strongly against maha meaning the complete obliteration of something without evidence. The bulk of evidence in both theological and non-theological occurrences of the word favors a removal of something or someone, many times with evidence remaining. This suggests that Flood models that argue for the complete obliteration of pre-Flood terrestrial organisms (even of their fossils) should be appropriately revised.
baqa\u27 (translated break up in Gen. 7: 11) is best translated burst open and implies that a catastrophic bursting initiated the Flood. ma\u27yan (translated fountain ) means place of the spring . Biblical usage indicates it refers to both terrestrial and oceanic springs. t ehom (translated deep ) and t ehom rabba (translated great deep ) each may refer to both oceanic and terrestrial waters. Since all the fountains of the great deep were involved, the Flood was initiated by the bursting open of both terrestrial and oceanic springs. Flood models which argue for the bursting of either only terrestrial or only oceanic springs should be appropriately revised
Fast Dynamic System Identification with Karhunen-Lo\`eve Decomposed Gaussian Processes
A promising approach for scalable Gausian processes (GPs) is the
Karhunen-Lo\`eve (KL) decomposition, in which the GP kernel is represented by a
set of basis functions which are the eigenfunctions of the kernel operator.
Such decomposed kernels have the potential to be very fast, and do not depend
on the selection of a reduced set of inducing points. However KL decompositions
lead to high dimensionality, and variable selection becomes paramount. This
paper reports a new method of forward variable selection, enabled by the
ordered nature of the basis functions in the KL expansion of the Bayesian
Smoothing Spline ANOVA kernel (BSS-ANOVA), coupled with fast Gibbs sampling in
a fully Bayesian approach. It quickly and effectively limits the number of
terms, yielding a method with competitive accuracies, training and inference
times for tabular datasets of low feature set dimensionality. The inference
speed and accuracy makes the method especially useful for dynamic systems
identification, by modeling the dynamics in the tangent space as a static
problem, then integrating the learned dynamics using a high-order scheme. The
methods are demonstrated on two dynamic datasets: a `Susceptible, Infected,
Recovered' (SIR) toy problem, with the transmissibility used as forcing
function, along with the experimental `Cascaded Tanks' benchmark dataset.
Comparisons on the static prediction of time derivatives are made with a random
forest (RF), a residual neural network (ResNet), and the Orthogonal Additive
Kernel (OAK) inducing points scalable GP, while for the timeseries prediction
comparisons are made with LSTM and GRU recurrent neural networks (RNNs) along
with a number of basis set / optimizer combinations within the SINDy package
Epithelial immunomodulation by aerosolized Toll-like receptor agonists prevents allergic inflammation in airway mucosa in mice
Allergic asthma is a chronic inflammatory respiratory disease associated with eosinophilic infiltration, increased mucus production, airway hyperresponsiveness, and airway remodeling. Epidemiologic data reveal that the prevalence of allergic sensitization and associated diseases has increased in the twentieth century. This has been hypothesized to be partly due to reduced contact with microbial organisms (the hygiene hypothesis) in industrialized society. Airway epithelial cells, once considered a static physical barrier between the body and the external world, are now widely recognized as immunologically active cells that can initiate, maintain, and restrain inflammatory responses, such as those that mediate allergic disease. Airway epithelial cells can sense allergens via expression of myriad Toll-like receptors (TLRs) and other pattern-recognition receptors. We sought to determine whether the innate immune response stimulated by a combination of Pam2CSK4 (βPam2β, TLR2/6 ligand) and a class C oligodeoxynucleotide ODN362 (βODNβ, TLR9 ligand), when delivered together by aerosol (βPam2ODNβ), can modulate the allergic immune response to allergens. Treatment with Pam2ODN 7 days before sensitization to House Dust Mite (HDM) extract resulted in a strong reduction in eosinophilic and lymphocytic inflammation. This Pam2ODN immunomodulatory effect was also seen using Ovalbumin (OVA) and A. oryzae (Ao) mouse models. The immunomodulatory effect was observed as much as 30 days before sensitization to HDM, but ineffective just 2 days after sensitization, suggesting that Pam2ODN immunomodulation lowers the allergic responsiveness of the lung, and reduces the likelihood of inappropriate sensitization to aeroallergens. Furthermore, Pam2 and ODN cooperated synergistically suggesting that this treatment is superior to any single agonist in the setting of allergen immunotherapy
Strong signature of natural selection within an FHIT intron implicated in prostate cancer risk
Previously, a candidate gene linkage approach on brother pairs affected with prostate cancer identified a locus of prostate cancer susceptibility at D3S1234 within the fragile histidine triad gene (FHIT), a tumor suppressor that induces apoptosis. Subsequent association tests on 16 SNPs spanning approximately 381 kb surrounding D3S1234 in Americans of European descent revealed significant evidence of association for a single SNP within intron 5 of FHIT. In the current study, resequencing and genotyping within a 28.5 kb region surrounding this SNP further delineated the association with prostate cancer risk to a 15 kb region. Multiple SNPs in sequences under evolutionary constraint within intron 5 of FHIT defined several related haplotypes with an increased risk of prostate cancer in European-Americans. Strong associations were detected for a risk haplotype defined by SNPs 138543, 142413, and 152494 in all cases (Pearson's Ο2 = 12.34, df 1, P = 0.00045) and for the homozygous risk haplotype defined by SNPs 144716, 142413, and 148444 in cases that shared 2 alleles identical by descent with their affected brothers (Pearson's Ο2 = 11.50, df 1, P = 0.00070). In addition to highly conserved sequences encompassing SNPs 148444 and 152413, population studies revealed strong signatures of natural selection for a 1 kb window covering the SNP 144716 in two human populations, the European American (Ο = 0.0072, Tajima's D= 3.31, 14 SNPs) and the Japanese (Ο = 0.0049, Fay & Wu's H = 8.05, 14 SNPs), as well as in chimpanzees (Fay & Wu's H = 8.62, 12 SNPs). These results strongly support the involvement of the FHIT intronic region in an increased risk of prostate cancer. Β© 2008 Ding et al
Genomewide identification of \u3ci\u3ePseudomonas syringae\u3c/i\u3e pv.\u3ci\u3etomato\u3c/i\u3e DC3000 promoters controlled by the HrpL alternative sigma factor
The ability of Pseudomonas syringae pv. tomato DC3000 to parasitize tomato and Arabidopsis thaliana depends on genes activated by the HrpL alternative sigma factor. To support various functional genomic analyses of DC3000, and specifically, to identify genes involved in pathogenesis, we developed a draft sequence of DC3000 and used an iterative process involving computational and gene expression techniques to identify virulence-implicated genes downstream of HrpLresponsive promoters. Hypersensitive response and pathogenicity (Hrp) promoters are known to control genes encoding the Hrp (type III protein secretion) machinery and a few type III effector proteins in DC3000. This process involved (i) identification of 9 new virulenceimplicated genes in the Hrp regulon by miniTn5gus mutagenesis, (ii) development of a hidden Markov model (HMM) trained with known and transposon-identified Hrp promoter sequences, (iii) HMM identification of promoters upstream of 12 additional virulence-implicated genes, and (iv) microarray and RNA blot analyses of the HrpLdependent expression of a representative subset of these DC3000 genes. We found that the Hrp regulon encodes candidates for 4 additional type III secretion machinery accessory factors, homologs of the effector proteins HopPsyA, AvrPpiB1 (2 copies), AvrPpiC2, AvrPphD (2 copies), AvrPphE, AvrPphF, and AvrXv3, and genes associated with the production or metabolism of virulence factors unrelated to the Hrp type III secretion system, including syringomycin synthetase (SyrE), N-(indole-3-acetyl)-L-lysine synthetase (IaaL), and a subsidiary regulon controlling coronatine production. Additional candidate effector genes, hopPtoA2, hopPtoB2, and an avrRps4 homolog, were preceded by Hrp promoter-like sequences, but these had HMM expectation values of relatively low significance and were not detectably activated by HrpL
Genetic diversity in Campylobacter jejuni is associated with differential colonization of broiler chickens and C57BL/6J IL10-deficient mice
Previous studies have demonstrated that Campylobacter jejuni, the leading causative agent of bacterial food-borne disease in the USA, exhibits high-frequency genetic variation that is associated with changes in cell-surface antigens and ability to colonize chickens. To expand our understanding of the role of genetic diversity in the disease process, we analysed the ability of three C. jejuni human disease isolates (strains 11168, 33292 and 81-176) and genetically marked derivatives to colonize Ross 308 broilers and C57BL/6J IL10-deficient mice. C. jejuni colonized broilers at much higher efficiency (all three strains, 23 of 24 broilers) than mice (11168 only, 8 of 24 mice). C. jejuni 11168 genetically marked strains colonized mice at very low efficiency (2 of 42 mice); however, C. jejuni reisolated from mice colonized both mice and broilers at high efficiency, suggesting that this pathogen can adapt genetically in the mouse. We compared the genome composition in the three wild-type C. jejuni strains and derivatives by microarray DNA/DNA hybridization analysis; the data demonstrated a high degree of genetic diversity in three gene clusters associated with synthesis and modification of the cell-surface structures capsule, flagella and lipo-oligosaccharide. Finally, we analysed the frequency of mutation in homopolymeric tracts associated with the contingency genes wlaN (GC tract) and flgR (AT tracts) in culture and after passage through broilers and mice. C. jejuni adapted genetically in culture at high frequency and the degree of genetic diversity was increased by passage through broilers but was nearly eliminated in the gastrointestinal tract of mice. The data suggest that the broiler gastrointestinal tract provides an environment which promotes outgrowth and genetic variation in C. jejuni; the enhancement of genetic diversity at this location may contribute to its importance as a human disease reservoir
- β¦