(3S,4Z)-3-Chloro-1-methyl-4-[(2E)-(3-methyl­benzyl­idene)hydrazinyl­idene]-3,4-dihydro-1H-2,1-benzothia­zine 2,2-dioxide

In the title compound, C17H16ClN3O2S, the dihedral angle between the benzene rings is 7.75 (13)°. The thia­zine ring adopts an envelope conformation with the S atom as the flap at a distance of 0.813 (2) Å from the plane through the other five atoms. In the crystal, C—H⋯O hydrogen bonds link the mol­ecules into chains propagating in [100]

6-Bromo-3,3-dichloro-1-methyl-1H-2,1-benzothia­zin-4(3H)-one 2,2-dioxide

The monomeric title compound, C9H6BrCl2NO3S, has an envelope-shaped thia­zine ring with the S atom 0.879 (9) Å out of the mean square plane of the envelope. The π–π distances between the centroids of the heterocyclic rings are 4.191 (5) and 4.110 (5) Å. The closest intermolecular inter­actions between the O atoms of the carbonyl and sulfonyl groups with Br and Cl atoms are 2.987 (7) and 2.992 (8) Å, respectively

Efficient forward error correction coding technique for spread spectrum communications

This thesis presents the study of the coding technique and the simulation results for the Forward Error Correction (FEC) of the wireless data in a highly noisy and severe fading wireless medium, based on standard (IEEE 802.11 Wireless Local Area Network specification) and GPS driven non-standard MAC schemes. The design and testing of this coding scheme is a part of MYMAR, a new Mobile Yellow page Messaging And Retrieval system, which is based on GPS driven slow frequency hopping access. The main contributions of this thesis are the demonstration of the performance of the coding scheme, which works well in severe fading environments. The coding technique uses simple Reed-Solomon Forward Error Correction mechanisms coupled with a new highly interleaved data table. The performance of the coding scheme is assessed in Rayleigh fading multipath propagation with additive white Gaussian noise interference coupled with interference due to like user frequency hop overlapping (in non-standard MAC scheme). Simulation results for severe fading channel with burst error models are presented for both standard and non-standard MAC mechanisms. The simulation show very good and satisfactory results for high data rate with good TPDU (Transport Protocol Data Unit) loss probabilities

Methyl 2-[(methyl­sulfon­yl)(prop­yl)amino]benzoate

The asymmetric unit of the title compound, C12H17NO4S, contains two mol­ecules, both of which show disorder of the two terminal C atoms of the propyl chain over two sets of sites with an occupancy ratio of 0.581 (6):0.419 (6). Intra­molecular C—H⋯O inter­actions help to establish the mol­ecular conformations: in one mol­ecule, the dihedral angle between the methyl ester group and the benzene ring is 41.0 (2)°, whereas in the other mol­ecule it is 36.12 (17)°. In the crystal, mol­ecules are linked by inter­molecular C—H⋯O and C—H⋯π inter­actions

2-{(E)-[(2Z)-(3-Chloro-1-methyl-2,2-di­oxo-3,4-dihydro-1H-2,1-benzo­thia­zin-4-yl­idene)hydrazinyl­idene]meth­yl}phenol

In the title compound, C16H14ClN3O3S, the thia­zine ring adopts a sofa (half-chair) conformation, with an r.m.s. deviation from the mean plane of 0.23 Å. The S atom and S-bonded C atom exhibit the maximum deviations from the thia­zine mean plane [−0.3976 (12) and 0.3179 (14) Å, respectively]. The conformations around the double bonds in the R 2C=N—N=CHR unit are Z and E. An intra­molecular O—H⋯N hydrogen bond with the hy­droxy group as donor generates an S(6) ring motif. In the crystal, pairs of weak C—H⋯O inter­actions connect the mol­ecules, forming inversion dimers

PLASMONIC PROPERTIES OF METALLIC NANOPARTICLES

In this study, the scattering properties of three different gold nano-particles have been studied. The proposed nano-particles are spherical, conical and cylindrical. The simulation results indicate that as the parameter of these nano-particles are changed so different LSPR peaks and shifts achieved in the scattering spectra. So this shows that the resonance modes are strongly reliant on the parameters of the proposed nano-particles. Moreover we have compared the scattering spectra of all the three nano-particles on the basis of their volume. The spherical nano-particle got wide spectral width, shift and high amplitude in the scattering spectra due to which it can be used for biomedical applications

Effects of co-infection on the clinical outcomes of Clostridium difficile infection

Background: Clostridium difficile (C. difficile) is a spore-forming, Gram-positive rod that is known to be associated with antibiotic use. It is one of the leading causes of nosocomial diarrhea in the industrialized world and therefore warrants further study of its nature. It isn\u27t clear if co-infection by other organisms can affect the outcome of C. difficile infection (CDI). Methods: A single center retrospective study was done and it used inclusion criteria of 18 years of age and being tested positive for CDI on FilmArray® multiplex gastro-intestinal (GI) panel. Exclusion criteria were a GI panel performed on an outpatient basis, recurrent CDI, and the presence of end-stage renal disease, cirrhosis, or a non-GI infection. The stool sample for all patients were collected within 48 h of presentation to the hospital. There were 235 of 2576 GI panels selected for a retrospective chart review based on the above criteria. Among these 235 patients, 38 had a co-infection (CDI+ another GI infection = group A or cases) and the rest had only CDI (group B or controls). Group A was compared with group B for CDI severity, its response to treatment, recurrence, and length of the hospital stay, using 0.05 as the alpha criterion. Results: Most patients with CDI were female and above the age of 60 years. Co infection did not increase the severity of CDI based both on the American College of Gastroenterology criteria (p 0.16) as well as Infectious Disease Society of America criteria (p 0.77). Co infection group also didn\u27t have significantly different CDI related treatment failure rate (p 0.23), or CDI recurrence rate (p 0.49). Co-infection was also not associated with lengthier hospital stay (p 0.41). Conclusion: Our study suggests that co-infection doesn\u27t affect the severity of CDI or can cause treatment failures. Additionally, there was no significant increase in hospital stay, or increase in CDI recurrence associated with co-infection. Therefore, if CDI is the leading clinical diagnosis and a patient is tested positive for co-infection in addition to CDI on FilmArray® multiplex GI panel, this co-infection shouldn\u27t change the management for CDI. Limitations of this study (including retrospective nature of the study, small sample size, single site study, not including all microbiome and non-inclusion of race) should also be taken into account, while considering the applicability of the results of this study

2-(Methoxy­carbon­yl)anilinium dihydrogen phosphate

The title compound, C8H10NO2 +·H2PO4 −, is a derivative of the naturally occurring compound methyl­anthranilate. The asymmetric unit comprises the 2-(methoxy­carbon­yl)anilinium cation and the dihydrogen phosphate anion. In the cation, the dihedral angle between the benzene ring plane and that through the methyl ester substituent is 22.94 (9)°. In the crystal, adjacent cations and anions form dimers through N—H⋯O and O—H⋯O hydrogen bonds, respectively. Additional N—H⋯O and C—H⋯O contacts result in a network of cation and anion dimers stacked down the b axis

6-Bromo-1-methyl-1H-2,1-benzothia­zin-4(3H)-one 2,2-dioxide

In the crystal structure of the title compound, C9H8BrNO3S, the thia­zine ring is in the twisted form. In the crystal, pairs of inter­molecular C—H⋯O hydrogen bonds form inversion dimers with an R 2 2(8) ring motif. Weak inter­molecular C—H⋯Br and C—H⋯π inter­actions are also present

3,3,6-Tribromo-1-methyl-1H-2,1-benzo­thia­zin-4(3H)-one 2,2-dioxide

In the title compound, C9H6Br3NO3S, a halogenated benzothia­zine derivative, the thia­zine ring adopts a sofa conformation. The crystal studied was a racemic twin with a contribution of 72 (1)% of the major domain