Set Theoretic Rajan Transform and its Properties

In this paper we describe the formulation of a novel transform called Set Theoretic Rajan Transform STRT which is an extension of Rajan Transform RT RT is a coding morphism by which a number sequence integer rational real or complex of length equal to any power of two is transformed into a highly correlated number sequence of same length STRT was introduced by G Sathya In STRT RT is applied to a sequence of sets instead of sequences of numbers Here the union U is analogous to addition operation and symmetric difference is analogous to subtraction - This transform satisfies some interesting set theoretic properties like Cyclic Shift Invariance Dyadic Shift invariance Graphical Inverse Invariance This paper explains in detail about STRT and all of its set theoretic propertie

CFD Fuel Slosh Modeling of Fluid-Structure Interaction in Spacecraft Propellant Tanks with Diaphragms

Liquid sloshing within spacecraft propellant tanks causes rapid energy dissipation at resonant modes, which can result in attitude destabilization of the vehicle. Identifying resonant slosh modes currently requires experimental testing and mechanical pendulum analogs to characterize the slosh dynamics. Computational Fluid Dynamics (CFD) techniques have recently been validated as an effective tool for simulating fuel slosh within free-surface propellant tanks. Propellant tanks often incorporate an internal flexible diaphragm to separate ullage and propellant which increases modeling complexity. A coupled fluid-structure CFD model is required to capture the damping effects of a flexible diaphragm on the propellant. ANSYS multidisciplinary engineering software employs a coupled solver for analyzing two-way Fluid Structure Interaction (FSI) cases such as the diaphragm propellant tank system. Slosh models generated by ANSYS software are validated by experimental lateral slosh test results. Accurate data correlation would produce an innovative technique for modeling fuel slosh within diaphragm tanks and provide an accurate and efficient tool for identifying resonant modes and the slosh dynamic response

Overcoming early career barriers to interdisciplinary climate change research

Climate-change impacts are among the most serious and complex challenges facing society, affecting both natural and social systems. Addressing these requires a new paradigm of interdisciplinary collaboration which incorporates tools, techniques, and insights from across the social, natural, and engineering sciences. Yet, a wide range of intrinsic and extrinsic hurdles need to be overcome to conduct successful, integrated interdisciplinary research. The results of a bibliometric analysis and survey of early to mid-career scientists from 56 countries who were involved with the interdisciplinary DISsertations initiative for the advancement of Climate Change ReSearch (DISCCRS) emphasize the particular challenges faced by early career researchers. Survey respondents perceive conflict between the need for interdisciplinary climate-change research and its potential detriment to career advancement. However, participation in interventions for early career scientists, such as networking and training symposia, had both perceived and measurable impacts on the likelihood of engagement in climate-centric interdisciplinary research. Respondents also ranked alternative mechanisms for encouraging incorporation of interdisciplinary science at early career stages, prioritizing funding of interdisciplinary seed grants, fellowships, and junior faculty networks, interdisciplinary teamwork and communication training, and interdepartmental symposia. To this we add the suggestion that interdisciplinarity be incorporated into tenure and promotion evaluations through the use of exploratory science mapping tools. Despite the need to foster interdisciplinary research and the availability of multiple prospective solutions, there remain expansive structural challenges to its promotion and recognition which, unless collectively addressed, will continue to hinder its potential growth and application to climate-change science

The Effectiveness of Augmented Reality as a Facilitator of Information Acquisition in Aviation Maintenance Applications

Until recently, in the field of Augmented Reality (AR) little research attention has been paid to the cognitive benefits of this emerging technology. AR, the synthesis of computer images and text in the real world, affords a supplement to normal information acquisition that has yet to be fully explored and exploited. AR achieves a more smooth and seamless interface by complementing human cognitive networks, and aiding information integration through multimodal sensory elaboration (visual, verbal, proprioceptive, and tactile memory) while the user is performing real world tasks. AR also incorporates visuo-spatial ability, which involves the representations of spatial information in memory. The use of this type of information is an extremely powerful form of elaboration. This study examined four learning paradigms: print (printed material) mode, observe (video tape) mode, interact (text annotations activated by mouse interaction) mode, and select (AR) mode. The results of the experiment indicated that the select (AR) mode resulted in better learning and recall when compared to the other three conventional learning modes

IN VITRO ANTICANCER POTENTIAL OF STATIN FROM ASPERGILLUS TAMARII GRD119

Objectives: Fungi have been largely targeted for their biopotential mainly in pharmaceutical industry. Recently, there has been an increase in screening of biopharmaceuticals from microorganisms so as to eliminate side-effects and chemical damages from non-natural sources.Methods: In the present study, Aspergillus tamarii GRD119 (JX110981) was screened for the production of statin by conducting bioassays against Candida and filamentous fungi.Results: Based on the results obtained showing effective inhibition potential against Candida spp and A. fumigatus, further analysis of purification of statin by several chromatographic analyses such as column chromatography, TLC, HPTLC and HPLC was conducted. The extracted statin shows strong cytotoxic activity against HEP G2 cell line.Conclusions: These results designate the fungal strain and the statin produced can serve as candidates for potential genetic transformation and further structural analysis respectively.Keywords: Aspergillus tamarii, chromatography, purification, statin, cytotoxicity

A CFD Approach to Modeling Spacecraft Fuel Slosh

Energy dissipation and resonant coupling from sloshing fuel in spacecraft fuel tanks is a problem that occurs in the design of many spacecraft. In the case of a spin stabilized spacecraft, this energy dissipation can cause a growth in the spacecrafts' nutation (wobble) that may lead to disastrous consequences for the mission. Even in non-spinning spacecraft, coupling between the spacecraft or upper stage flight control system and an unanticipated slosh resonance can result in catastrophe. By using a Computational Fluid Dynamics (CFD) solver such as Fluent, a model for this fuel slosh can be created. The accuracy of the model must be tested by comparing its results to an experimental test case. Such a model will allow for the variation of many different parameters such as fluid viscosity and gravitational field, yielding a deeper understanding of spacecraft slosh dynamics. In order to gain a better understanding of the dynamics behind sloshing fluids, the Launch Services Program (LSP) at the NASA Kennedy Space Center (KSC) is interested in finding ways to better model this behavior. Thanks to past research, a state-of-the-art fuel slosh research facility was designed and fabricated at Embry Riddle Aeronautical University (ERAU). This test facility has produced interesting results and a fairly reliable parameter estimation process to predict the necessary values that accurately characterize a mechanical pendulum analog model. The current study at ERAU uses a different approach to model the free surface sloshing of liquid in a spherical tank using Computational Fluid Dynamics (CFD) methods. Using a software package called Fluent, a model was created to simulate the sloshing motion of the propellant. This finite volume program uses a technique called the Volume of Fluid (VOF) method to model the interaction between two fluids [4]. For the case of free surface slosh, the two fluids are the propellant and air. As the fuel sloshes around in the tank, it naturally displaces the air. Using the conservation of mass, momentum, and energy equations, as well as the VOF equations, one can predict the behavior of the sloshing fluid and calculate the forces, pressure gradients, and velocity field for the entire liquid as a function of time

Participatory management for conservation of seahorses in the Gulf of Mannar, South-east coast of India

The Inception Workshop of the research project “Participatory management for conservation of seahorses in the Gulf of Mannar, south-east coast of India” was organized on 27 December 2014 at the Mandapam Regional Centre of the Central Marine Fisheries Research Institute (ICAR), Mandapam Camp, Tamil Nadu. The workshop was aimed to mark the beginning of the project activities in the Gulf of Mannar and also to bring to one place all the concerned stakeholders who are directly or indirectly associated with sustainable management of seahorse fishery and conservation, and to inform them about the project, its objectives and the expectations. The workshop was also aimed to discuss and get feedback on the methodology and approach for implementation of the project activities such as field surveys and interviews with the stakeholders. The workshop also focused to gather valuable inputs from various stakeholders, which are vital for the on-going project

K-matrices for non-abelian quantum Hall states

Two fundamental aspects of so-called non-abelian quantum Hall states (the q-pfaffian states and more general) are a (generalized) pairing of the participating electrons and the non-abelian statistics of the quasi-hole excitations. In this paper, we show that these two aspects are linked by a duality relation, which can be made manifest by considering the K-matrices that describe the exclusion statistics of the fundamental excitations in these systems.Comment: LaTeX, 12 page