PURKH (E-Journals)
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Study of Radon Propagation in A Dwelling Using the CFD Modelling Capabilities of CONTAM
Get PDFNaturally occurring radon gas is the leading cause of lung cancer for nonsmokers. Limiting the amount of radon inhaled by residents when designing homes and HVAC system is of utmost importance. This report focuses on dedicated 3D CFD simulations of indoor radon distribution in a dwelling located in Madrid, Spain, using the CONTAM and CFD-0 software developed by NIST. CFD can be used and has many advantages for indoor air flow analysis with reduced mathematical limitations. The results are qualitative and show the possibility to calculate detailed volumetric radon concentrations inside a ventilated dwelling. This technique allows a better estimate of the radon infiltration rate to mitigate the accumulation of radon inside dwellings
Authentic High School Research Experiences: A Meta-synthesis
Get PDFResearch is often associated with both positive outcomes and arduous experiences for high school learners. This meta-synthesis aimed to synthesize findings that examined the day to day interactions and practices among research-engaged high school classrooms and how high school learners engaged themselves in the writing of a research paper. The synthesis generated 6 distinct themes with opposing concepts:
(1) mapping out the journey vs. navigating independently;
(2) privileging product over process;
(3) driving on training wheels vs. steering independently;
(4) teaching the life beyond while neglecting the primary and secondary skills;
(5) climbing the brick wall vs. finding the silver lining and
(6) living the new prescription vs. misconstruing research digitization.
The synthesis translated into two higher-order concepts:
(1) disorientation on inherent challenges and non-preparation for system reworking and
(2) balancing preparations and expectations. These concepts consider the experience among high school learners as a foundation for improved instructional practices among teachers and research institutions.
A Rigorous Geometrical Proof on Constructability of Magnitudes (A Classical Geometric Solution for the Factors: √2 and √(3&2))
Get PDFIn the absence of a comprehensive geometrical perceptive on the nature of rational (commensurate) and irrational (incommensurate) geometric magnitudes, a solution to the ages-old problem on the constructability of magnitudes of the forms and (the square root of two and the cube root of two as used in modern mathematics and sciences) would remain a mystery. The primary goal of this paper is to reveal a pure geometrical proof for solving the construction of rational and irrational geometric magnitudes (those based on straight lines) and refute the established notion that magnitudes of form are not geometrically constructible. The work also establishes a rigorous relationship between geometrical methods of proof as applied in Euclidean geometry, and the non-Euclidean methods of proof, to correct a misconception governing the geometrical understanding of irrational magnitudes (expressions). The established proof is based on a philosophical certainty that "the algebraic notion of irrationality" is not a geometrical concept but rather, a misrepresentative language used as a means of proof that a certain problem is geometrically impossible
New Chromogenic Spray Reagent for TLC Detection and Identification of Organophosphrous Insecticide Monocrotophos in Biological Material.
Get PDFMonocrotophos is a member of Organophosphate insecticide. It is an important insecticide and has a diversified role in agriculture in INDIA. The increasing numbers of human poisoning cases were found to be occurred by the consumption of organophosphate insecticide monocrotophos. So in this paper, we represent a novel Thin Layer Chromatographic spray reagent for the detection and identification of Monocrotophos
Tripolar fuzzy sub implicative ideals of KU-Algebras
Get PDFThe concept Tripolar fuzzy set is a generalization of bipolar fuzzy set, intuitionistic fuzzy set and fuzzy set. In this paper, the concept Tripolar fuzzy sub implicative ideals of KU-algebras are introduced and several properties are investigated. Also, the relations between Tripolar fuzzy sub implicative ideals and Tripolar fuzzy ideals are given. The image and the preimage of Tripolar fuzzy sub implicative ideals under homomorphism of KU-algebras are defined and how the image and the preimage of Tripolar fuzzy sub implicative ideals under homomorphism of KU-algebras become Tripolar fuzzy sub implicative ideals are studied. Moreover, the Cartesian product of Tripolar fuzzy sub implicative ideals in Cartesian product KU-algebras is established
Review of Mathematical Modelling of the Time Dependent Schrodinger Wave Equation using Different methods
Get PDFThis paper focuses on the principle of time dependent Schrödinger equation (TDSE) which simplified so many reviewed ideas, class room teaching, research ideologies and personal study meant for advanced knowledge. In this research work, the enlightenment of the basic concept of Schrödinger wave equation to improve knowledge about simple ways for mathematical understanding in deriving TDSE using different technique in more comprehensive approach. The research shows clearly that TDSE can be derived using time independent equation, wave mechanics, classical & Hamilton-Jacobi’s equations. Different methods and ways by different researchers/scholars have been used in the past. In this paper, we review the quantum field theoretic route to the Schrodinger wave equation which treats time and space as parameters, not operators. Furthermore, we recall that a classical (nonlinear) wave equation can be derived from the classical action via Hamiltonian-Jacobi theory. By requiring the wave equation to be linear we again arrive at the Schrodinger equation, without postulating operator relations. The underlying philosophy is operational. Surely, a particle is what a particle detector detects. This leads us to a useful physical picture combining the wave (field) and particle paradigms which points the way to the time-dependent Schrodinger equation. However, the result provides a comprehensive well derived derivation, derived using various approaches, which would make this research a unique one from different areas of specializations
Tax Plannıng and Fırm Value: An Empırıcal Analysıs of Consumer Goods Manufacturıng Companıes in Cyprus
Get PDFThe study identifies the impact of tax planning on the firm value of consumer goods manufacturing companies in Cyprus. The specific objectives are to determine the impact of firm and leverage on firm value of Cypriot consumer goods manufacturing companies. The data included in the study were collected from the annual reports and accounts of consumer goods of the manufacturing companies in Cyprus and formulated hypotheses were tested with multiple regression analysis. The result had a positive effect on our leverage dependent variable. Based on the findings of the study, the application of the study with more samples may be recommended for future studies
The Development, Verification and Evaluation of Container Closure Integrity Assessment of Prefilled Syringes Using Fluorescence Spectroflurometer
No full textThe preference of Prefilled syringes is increased over all the vials as container closure systems for liquid injections, when facilitated or self-administration is required.However, prefilled syringes are more complex compared to container closure system(CCS) consisting of vial, rubber stopper and flip off. Container closure integrity assurance and verification has been a specific challenge for prefilled syringes as they feature several sealing areas. A comprehensive understanding of the container closure system is necessary for an appropriate container closure integrity assessment as well as for packagingdevelopment and qualification.
Method for the measurement ofcontainer closure integrity(CCI) of prefilled syringes using fluorescence spectrophotometry was developed and validated with a spectroflurometer.Methylene blue solution was initially evaluated as the fluorophore ina syringe with excitation at 605 nm and emission at 678 nm, which generated a limit of detection of 0.06µg/mL. Furtherstudies were conducted using Rhodamine 123, a dye with stronger fluorescence. Using 482 nm excitation and 527 nmemission, the dye in the syringe could be easily detected at levels as low as 0.001 µg/mL. The relative standard deviationfor sixmeasurements of three different sample with different concentration was less than 2.8%. A number of operational parameters were optimized, including the photomultiplier tube voltage, excitation, andemission slit widths. The specificity of container closure integrity was checked by using marketed drug products sample,which showed no interference to the rhodamine detection. Results obtained from this study demonstrated that usingrhodamine 123 for container closure integrity testing with in syringe fluorescence measurements significantlyenhanced the sensitivity and robustness of the testing and effectively overcame limitations of the traditional methylene bluemethod with visual or UV-visible absorption detection
Studies of Complexation of Transition Metal Ions With Benazepril Drug in Aqueous Media: Thermodynamic Aspect
Get PDFStability constant of Benazepril hydrochloride drug with transition metal ions Fe3+, Co2+, Ni2+, Cu2+, Zn2+ and Cd2+ using a pH metric titration technique in 20%(v/v) ethanol-water mixture at three different temperatures 300K, 310K & 320K at an ionic strength of 0.1M NaClO4 were studied. The Calvin-Bjerrum method as adopted by Irving-Rossotti has been employed to determine metal-ligand stability, constant logK values. The trend in the formation constants for transition metal ions follows the order: Fe3+ > Cu2+ > Cd2+> Co2+ > Zn2+ > Ni2+. The thermodynamic parameters, such as Gibb’s free energy change (ΔG), entropy change (ΔS), and enthalpy change (ΔH) associated with the complexation reactions, were calculated
Characterization of Maps on Positive Semidefinite Choi Matrices
No full textSeveral investigations have been done on positive maps on their algebraic structures with more emphasis on completely positive maps. In this study, we have described the structure of the Choi matrices for 2-positive maps on positive semidefinite matrices and the conditions for complete positivity of positive linear maps from n to n+1. The motivation behind these objectives is work done by Majewski and Marciniak on the structure of positive maps ф from Mn to Mn + 1(2 ≥ 2) between matrix algebras