292 research outputs found
Woven design data transmission using TTL logic for 128 hooks electronic cardless jacquard
A new electronic cardless handloom weaving apparatus which is an alternate to mechanical jacquard has been developed in order to improve the productivity and to reduce the occupational stress of the handloom weaver. The main objective of this development is to retain the features of the handloom with comfortable weaving and reduced laborious work. This development is based on embedded system to control the warp yarn vertical movement. The conventional punched cards are replaced by multimedia memory card file system. The shedding effect is programmatically controlled through miniature stepper motors. The new apparatus is found to be highly versatile for introducing variety of weaving patterns
Conformational and steric effects on the oxidation of some substituted tetrahydrothiopyran-4-ones and their 1, 1-dioxides by pyridinium fluorochromate
738-74
Ultraviolet-Resistant Bacterial Spores
A document summarizes a study in which it was found that spores of the SAFR-032 strain of Bacillus pumilus can survive doses of ultraviolet (UV) radiation, radiation, and hydrogen peroxide in proportions much greater than those of other bacteria. The study was part of a continuing effort to understand the survivability of bacteria under harsh conditions and develop means of sterilizing spacecraft to prevent biocontamination of Mars that could interfere with the search for life there
Conformational and steric effects on the oxidation of some cyclic ketones by pyridinium fluorochromate
544-54
Current Treatment of Venous Thromboembolism
Venous thromboembolism (VTE), comprising deep vein thrombosis and pulmonary embolism, is a common disorder with at least 250,000 new events occurring each year in the United States alone. Treatment of VTE entails anticoagulation, which is achieved initially with the use of a parenterally administered anticoagulant followed by a more prolonged course of treatment with an oral vitamin K antagonist. The duration of anticoagulation depends on the clinical assessment of the benefit-risk ratio of prolonged anticoagulation versus the risk of recurrent events. In this review, we discuss some of the issues that we believe are among the most critical unanswered questions in the management of VTE in the present era
Adsorption of Chromium Ions by Acid Activated Low Cost Carbon-Kinetic,Thermodynamic and Equilibrium Studies
Abstract: A carbonaceous adsorbent prepared from an indigenous waste, by acid treatment was tested for its efficiency in removing metal ions. The process parameters studied include agitation time, initial metal ions concentration, carbon dose, pH and temperature. The adsorption followed first order reaction equation and the rate is mainly controlled by intra-particle diffusion. Freundlich and Langmuir isotherm models were applied to the equilibrium data. The adsorption capacity (Q m ) obtained from the Langmuir isotherm plot were found to around 30 mg/g at an initial pH of 7.0. The temperature variation study showed that the metal ions adsorption is endothermic and spontaneous with increased randomness at the solid solution interface. Significant effect on adsorption was observed on varying the pH of the metal ion solutions. The Langmuir and Freundlich adsorption isotherms obtained, positive H 0 value, pH dependent results and desorption of metal ions in mineral acid suggest that the adsorption of metal ions on BBC involves chemisorption as well as physisorption mechanism
Coagulation Abnormalities and Thrombosis in Patients Infected with SARS-CoV-2 and Other Pandemic Viruses
The world is amid a pandemic caused by severe acute respiratory syndrome-coronavirus 2. Severe acute respiratory syndrome-coronavirus causes serious respiratory tract infections that can lead to viral pneumonia, acute respiratory distress syndrome, and death. Some patients with coronavirus disease 2019 (COVID-19) have an activated coagulation system characterized by elevated plasma levels of d-dimer - a biomarker of fibrin degradation. Importantly, high levels of D-dimer on hospital admission are associated with increased risk of mortality. Venous thromboembolism is more common than arterial thromboembolism in hospitalized COVID-19 patients. Pulmonary thrombosis and microvascular thrombosis are observed in autopsy studies, and this may contribute to the severe hypoxia observed in COVID-19 patients. It is likely that multiple systems contribute to thrombosis in COVID-19 patients, such as activation of coagulation, platelet activation, hypofibrinolysis, endothelial cell dysfunction, inflammation, neutrophil extracellular traps, and complement. Targeting these different pathways may reduce thrombosis and improve lung function in COVID-19 patients
Large-Scale Automatic Reconstruction of Neuronal Processes from Electron Microscopy Images
Automated sample preparation and electron microscopy enables acquisition of
very large image data sets. These technical advances are of special importance
to the field of neuroanatomy, as 3D reconstructions of neuronal processes at
the nm scale can provide new insight into the fine grained structure of the
brain. Segmentation of large-scale electron microscopy data is the main
bottleneck in the analysis of these data sets. In this paper we present a
pipeline that provides state-of-the art reconstruction performance while
scaling to data sets in the GB-TB range. First, we train a random forest
classifier on interactive sparse user annotations. The classifier output is
combined with an anisotropic smoothing prior in a Conditional Random Field
framework to generate multiple segmentation hypotheses per image. These
segmentations are then combined into geometrically consistent 3D objects by
segmentation fusion. We provide qualitative and quantitative evaluation of the
automatic segmentation and demonstrate large-scale 3D reconstructions of
neuronal processes from a volume of brain
tissue over a cube of in each dimension corresponding to
1000 consecutive image sections. We also introduce Mojo, a proofreading tool
including semi-automated correction of merge errors based on sparse user
scribbles
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