PURKH (E-Journals)
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Embedded Tautomerism in a DADNE embedded pull-push structure- A DFT treatise
No full text1,5-Type proton tautomerism of 2-(dinitromethylene)-4,5-dinitro-2,3-dihydro-1H-imidazole structure is considered within the constraints of density functional theory at the level of B3LYP/6-311++G(d,p). One of the pentad tautomers has been found to be almost as stable as the parent structure. The local aromaticity search (NICS(0)) indicated that both of the structures have an embedded aromatic imidazole ring system, which is not expected at first sight for the parent structure and possible causes of it are sought. Also, various quantum chemical results, calculated IR, and UV spectra are obtained and discussed
Experimental research on the behavior of electrolytes at high frequencies Author: Parantap Nandi
No full textTraditional electrolysis using direct current as a power source finds numerous applications. The electrodes having definite polarities make ionization/discharge possible. Generally, heavy currents at low voltages are used. Electrolysis using power frequency sinusoidal voltage can yield substantial products as has been proved experimentally. This relies on high voltages low currents of the order of mA. High frequency alternating currents of the order of several tens of kilohertz if harnessed carefully should be able to cause ionization/discharge as the case may be. This may pave the way for hydrogen production using suitable electrodes where current remains in the range of mA, unlike conventional electrolysis experiments. However, the low mobility of heavy ions may impose significant difficulties. This may be overcome using techniques such as heterogeneous supply and auxiliary electrodes. The choice of the materials used for the electrodes is very important. In this paper, electrolysis techniques using high-frequency voltage, waves have been expounded
Strategic management and Small and Medium Enterprises Performance: Evidence from Lagos State, Nigeria
No full textThe study examines the impact of strategic management on the performance of SMEs in Lagos State, Nigeria. A survey of two hundred and two (202) of Small and Medium Enterprises (SMEs) that have been in operation for the past ten (10) years were randomly selected from one thousand nine hundred and sixty-five (1,965) that registered with Ministry of Commerce and Industry in Lagos State. Data analysis was performed with the aid of an Ordinary Least Square method of estimation. The findings reveal that commitment to strategic management has a positive impact on SMEs’ performance but not significant, while the inclusion of members of staff in the strategic management process has a positive and significant impact on SMEs’ performance. The study concludes that for SMEs in Nigeria to achieve sustainable competitive advantages in this era of the cut-throat global competitive environment, the inclusion of all stakeholders in the strategic management process is prime importance
Women Entrepreneurs in Small And Medium Enterprises (SMEs) And Sustainable Development: Evidence From Southwest Of Nigeria
No full textThis study examines the role of women entrepreneurs in sustainable economic development. This study employs descriptive survey design while judgmental sampling technique was used to select five hundred and fifty (550) women entrepreneurs from three thousand eight hundred (3,800) women entrepreneurs that registered with Small and Medium Enterprises Development Agency of Nigeria in South-Western Nigeria. Mean, frequency, simple percentage, and Chi-Square were used to analyze data. Results indicate that the positive attitude of women towards entrepreneurship has improved the family standard of living, and the rate of poverty has reduced tremendously, while women's entrepreneurial activities have assisted in creating employment for youths. Therefore, the study recommends that the government should establish a financial institution that will provide interest-free loans to active, energetic women entrepreneurs rather than engaging in the "Trader-Moni scheme" by given interest-free loans to the selected market women across the country. Also, the government should put a policy in place that will ease cultural influence on women entrepreneurs and encouraging more women to start businesses in industries with greater growth potential
The Role And Contribution Of Migrants Interactions To Indigenous Technology And Value Chain Development Among Selected Small And Medium Scale Entrepreneurs In Southern Nigeria
No full textResearch on local technology and innovation in Nigeria has largely focused on the role and contribution of government to national development. In contrast, this article explores the way in which migrants (returnees from Europe, America, and Asia and their family members) serve as potential sources of knowledge and innovative ideas towards new and improved development on local technology. This article investigates the continuous interactions, cross-pollination of ideas, and exposure to the needs and demands of Nigerian Diaspora. Based on the qualitative data collected, the study revealed entrepreneurs in the small and medium scale industries ingenuities were often dependent on the mingling and interaction with migrants (returnee and family members living overseas) in fabricating metal and allied products that are in high demands abroad. Narratives revealed that the demands and peculiarities of African cuisines, fashion, and healthcare needs are greatly informed by these interactions. It is recommended thus that small and medium scale entrepreneurs should build and capitalize on the social capital migrants provide through their interactions by way of requests and patronages of locally fabricated goods and simple technology available in the Nigerian markets
Pythagorean Neutrosophic Pre-Open Sets
No full textThe purpose of this paper is to introduce and study the notion of Pythagorean neutrosophic pre-open sets by using the notion of Pythagorean neutrosophic open set. Besides, we define the concepts of Pythagorean neutrosophic pre-open function, Pythagorean neutrosophic pre-continuous function, and Pythagorean neutrosophic pre-homeomorphism. Moreover, some of their properties are proved
Approximating electron states in a cylindrical quantum wire with an intrinsic inverse parabolic potential
No full textA theoretical investigation on comparison of electron states obtained from the exact wave functions and those obtained from approximate wave functions is presented. The functions used to approximate the exact wave functions are the parabolic and the cosine functions. For this purpose, oscillator strength for optical transitions in a cylindrical quantum wire due to circularly polarized electromagnetic radiation was evaluated using the exact wave functions and compared with those obtained using the approximate wave functions. These calculations were carried out within the effective mass approximation. The approximate wave functions preserve the functional form of the oscillator strength and other quantum mechanical quantities upon which it depends, namely the electron eigen energies and the interaction integral. Although the approximate wave functions preserve the functional form of the quantum quantities successfully, they fall short in producing accurate magnitudes of the quantum mechanical properties, which is apparent for excited states
On Decomposition of Continuity Via *μ-Closed Sets
Get PDFThere are various types of generalization of continuous functions in the development of topology. Recently some decompositions of continuity are obtained by various authors with the help of generalized continuous functions in topological spaces. In this paper we obtain a decomposition of continuity using a generalized continuity called *u-continuity in topology
Norms of Self-Adjoint Two-Sided Multiplication Operators in Norm-Attainable Classes
Get PDFLet B(H) be the algebra of all bounded linear operators on a complex Hilbert space H. In this note, we give characterizations when the elementary operator TA,B: B(H)→B(H) defined by TA,B(X) =AX B + BX A, ∀ X ∈ B(H) and A, B fixed in B(H) is self adjoint and implemented by norm-attainable operators. We extend our work by showing that the norm of the adjoint of TA, B is equal to the norm of TA,B when it is implemented by normal operators
New Results on Extension of Linear Operators and Markov Moment Problem
Get PDFOne recalls earlier applications of extension of linear operators with two constraints to the abstract Markov moment problem and Mazur-Orlicz theorem. Next we generalize one of our previous results on the characterization for the existence of a linear extension preserving the sandwich condition on the positive cone of the domain (where are given linear operators). Precisely, a similar characterization is obtained, when the sandwich condition on the extension is on , where are sublinear operators, and is an arbitrary convex cone (that might be the entire domain space). In the end, solutions of moment and Mazur-Orlicz problems are discussed, pointing out evaluation of their norms. All these solutions are obtained from the theorems previously stated or proved in this work. Some of the solutions are Markov operators