Descents, Peaks, and P -partitions A dissertation presented to the Faculty of the Graduate School of Arts and Sciences of Brandeis University, Waltham, Massachusetts by T. Kyle Petersen We use a variation on Richard Stanley’s P -partitions to study “Eulerian” descent subalgebras of the group algebra of the symmetric group and of the hyperoctahedral group. In each case we give explicit structure...

Since the published MS-GFDB did not support variable PTMs at the time that this research was carried out, both MS-GFDB and PEAKS DB were run without specifying any variable PTMs. The other parameters, including the fixed PTMs, remained the same as described in the results section. The results are shown in Figure S2 for CID and Figure S3 for ETD datasets, respectively. Note that the removal of t...

An image may be decomposed as a difference between an image of peaks and an image of wells. Applying a morphological operator to these two components before reconstructing a final image produces interesting filters for grey tone or binary images. This decomposition depends upon the point of view from where the image is considered.

BACKGROUND Metabolomics LC-MS experiments yield large numbers of peaks, few of which can be identified by database matching. Many of the remaining peaks correspond to derivatives of identified peaks (e.g., isotope peaks, adducts, fragments and multiply charged molecules). In this article, we present a data-reduction approach that automatically identifies these derivative peaks. RESULTS Using ...

Beryllium  oxide  (BeO)  nanopowder  was  synthesized  using  sol-gel method  and  the  effects  of  changes of  chemical  reagents  were investigated.  Because  of  tissue  equivalence  and  other  outstanding thermoluminescence  (TL) properties of  the bulk material  in X and γ dosimetry, the applicability of this nanostructure in TL dosimetry was studied  following  irradiation to  the 137 C...

Vibration Analysis Tests (VAT) and Acoustic Emission tests (AE) are used in several industrial applications. Many of them perform analysis in the frequency domain. Peaks in the power density spectrum hold relevant information about acoustic events. In this paper we propose a novel method for feature extraction of vibration samples by analyzing the shape of their auto power spectrum density func...

The usefulness of Fourier analyses as a tool for determining key parameters of cancellous bone structure is investigated. The autocorrelation function is used to determine measures of preferred orientation of trabeculae and anisotropy. Peaks in the power spectrum are used to determine average trabecular strut spacing. Good agreement and high correlations were observed when these frequency domai...

In elution chromatography, mod$ers sometimes are added to the mobile phase to compete with sample solutes for binding sites in order to reduce the retention time and band spreading of sample solutes. In this work, the interrelationship between modiJiers and sample solutes in preparative and large-scale chromatography is investigated using a nonlinear multicomponent rate model in which axial dis...

Mass spectrometry data from high-resolution time-of-flight instruments often contain a vast number of noninformative background-ion peaks whose signal is similar to that of peptide peaks. Consequently, seeking peptide signal in these spectra based on a signal-to-noise ratio will remove signal peaks as well as noise. This work characterizes the background as a precursor to seeking peptide-relate...

Unfortunately, many people, including many psychotherapists, mistakenly think that Obsessive-compulsive disorder (OCD) in children and adolescents is rare. Recent research indicates that approximately half of all adults with OCD experience clinical symptoms of the disorder during their childhood. OCD in childhood is a chronic and distressing disorder that can lead to severe impairments in socia...