Entrepreneurial Competencies and Growth of New Micro Small and Medium Businesses

Authors: Raja Mejri, Mahmoud Zouaoui

ABSTRACT
Encouraging the creation of companies has become the leitmotif for solving the economic and social problems of states, especially when it comes to companies with real potential for growth, which constitutes the real levers of countries development. We focus on the profile of entrepreneurs who create small businesses and who can successfully increase their projects after a few years. They are the pillars of success insofar as the company is the projection of their characteristics. This document attempts to better understand the impact of entrepreneurial competencies on the growth of the company. The research was carried out using a questionnaire sent to 181 micro, small and medium-sized enterprises (MSME’s) newly created. For the analysis of the results we have mobilized the method of structural equations. The results confirmed that the growth of the company is well influenced by managerial and networking competencies.

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Journal: Open Journal of Business and Management
DOI: 10.4236/ojbm.2020.83074(PDF)
Paper Id: 100126 (metadata)

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Near-Infrared Transit Photometry of Extra-Solar Planet HAT-P-54b

Authors: Haruka Tabata, Yoichi Itoh

ABSTRACT
The results of near-infrared photometric observations of a transit event of an extrasolar planet HAT-P-54b are presented herein. Precise near-infrared photometry was carried out using the Nayuta 2 m telescope at Nishi-Harima Astronomical Observatory, Japan and Nishi-Harima Infrared Camera (NIC). 170 J-, H-, and Ks-band images were taken in each band in 196 minutes. The flux of the planetary system was observed to decrease during the transit event. While the Ks-band transit depth is similar to that in the r-band, the J- and H-band transits are deeper than those in the Ks-band. We constructed simple models of the planetary atmosphere and found that the observed transit depths are well reproduced by inflated atmosphere containing H2S molecule.

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Journal: International Journal of Astronomy and Astrophysics
DOI: 10.4236/ijaa.2020.102007(PDF)
Paper Id: 100104

(metadata)

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Mechanical Stress to Cell Nucleus Inhibits Proliferation and Differentiation of Vascular Smooth Muscle Cells

Author: Kazuaki Nagayama

ABSTRACT
Cells sense the external environment such as a surface topography and change many cellular functions. Cell nucleus has been proposed to act as a cellular mechanosensor, and the changes in nuclear shape possibly affect the functional regulation of cells. This study demonstrated a large-scale mechanical deformation of the intracellular nucleus using polydimethylsiloxane (PDMS)-based micropillar substrates and investigated the effects of nuclear deformation on migration, proliferation, and differentiation of vascular smooth muscle cells (VSMCs). VSMCs spread completely between the fibronectin-coated pillars, leading to strong deformations of their nuclei resulted in a significant inhibition of the cell migration. The proliferation and smooth muscle differentiation of VSMCs with deformed nuclei were dramatically inhibited on the micropillars. These results indicate that the inhibition of proliferation and VSMC differentiation resulted from deformation of the nucleus with high internal stress, and this type of large-scale nuclear mechanical stress might lead the cells to a “quiescent state”.

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Journal: Journal of Biosciences and Medicines
DOI: 10.4236/jbm.2020.85013(PDF)
Paper Id: 100047 (metadata)

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The Whole Truth about Partial Truth Tables

Author: Keith Burgess-Jackson

ABSTRACT
Partial truth tables have two salient virtues. First, like whole truth tables, they are algorithmic (i.e., effective). If you construct them correctly, you will get an answer to your question whether a particular argument is valid; whether a particular proposition is tautologous, self-contradictory, or contingent; or whether a particular set of propositions is consistent. Second, they are less time-consuming and tedious to construct than whole truth tables. No partial truth table has more than three rows, and many have only one. A whole truth table, by contrast, may have as many as 32, 64, 128, or 256 rows (or more). In this essay, I explain what a partial truth table is and show how such a table is constructed. I then apply the partial-truth-table technique successively to arguments, individual propositions, and sets of two or more propositions. I conclude by evaluating the most widely used logic textbooks, showing what they do well and where they fall short.

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Journal: Open Journal of Philosophy
DOI: 10.4236/ojpp.2020.102014(PDF)
Paper Id: 100016 (metadata)

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Thermoelectric Energy Conversion of a Drinking Bird by Disk-Magnet Electromagnetic Induction

Authors: Hiroshi Uechi, Schun T. Uechi

ABSTRACT
We discuss a thermoelectric energy generation (TEG) technique by employing a thermomechanical model of a drinking bird (DB). The motion of a drinking bird is produced by the entropy-flow explained by the second law of thermodynamics, which is one of the fundamental laws of heat engines. We propose a disk-magnet electromagnetic induction (DM-EMI) employed to the motion of a drinking bird. The generalization of DM-EMI to heat engines for mechanoelectric energy conversions and properties of extracted electric powers are specifically discussed. The electric power of DM-EMI has a limited power generation characteristic to a mechanical rotation produced by heat engines, but it will be very useful for practical applications to wind turbines, coal-fired and nuclear power plant for mechanoelectric energy conversions. The DM-EMI will contribute to environmental problems to maintain clean and susceptible energy as one of energy harvesting technologies.

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Journal: World Journal of Engineering and Technology


DOI: 10.4236/wjet.2020.82017(PDF)
Paper Id: 99971 (metadata)

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Effective Trace Acquirement during Product Information Diffusion and Application

Authors: Xuehua Sun, Jianjun Wang, Guozhang Xu, Hongwei Gao, Liping Ma

ABSTRACT
Information dissemination has become part of people’s daily communication and there is great interest for both academic and industrial communities. Most previous studies have focused on the strategy and mechanisms. The methods controlling the process of information diffusion have rarely been studied. Thus, previous studies have failed to effectively mine the value of product information diffusion on social networks. In this study, based on the information diffusion product in consumer self-organized social networks, the control of the product information diffusion process was explored. The node identification principle of the QR code sender designed in this study and the linked list that associated information with specific nodes allowed the acquisition of effective traces in long-chain transmission from the information source to the value nodes, and solved user information disclosure during the transmission process. This method was applied to the tracing system of defective vehicles, achieving accurate recall of defective vehicles.

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Journal: Intelligent Information Management
DOI: 10.4236/iim.2020.123008(PDF)
Paper Id: 99964 (metadata)

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Use of GIS and Remote Sensing Technology as a Decision Support Tool in Flood Disaster Management: The Case of Southeast Louisiana, USA

Authors: Yaw A. Twumasi, Edmund C. Merem, John B. Namwamba, Ronald Okwemba, Tomas Ayala-Silva, Kamran Abdollahi, Onyumbe E. Ben Lukongo, Joshua Tate,
Kellyn La Cour-Conant, Caroline O. Akinrinwoye

ABSTRACT
The primary objective of this paper was to identify flood-prone areas in Southeast of Louisiana to help decision-makers to develop appropriate adaptation strategies and flood prediction, and mitigation of the effects on the community. In doing so, the paper uses satellite remote sensing and Geographic Information System (GIS) data for this purpose. Elevation data was obtained from the National Elevation Dataset (NED) produced by the United States Geological Survey (USGS) seamless data warehouse. Satellite data was also acquired from USGS Earth explorer website. Topographical information on runoff characteristics such as slope, aspect and the digital elevation model was generated. Grid interpolation TIN (triangulated irregular network) was carried from the digital elevation model (DEM) to create slope map. Image Drape was performed using ERDAS IMAGINE Virtual GIS. The output image was then draped over the NED elevation data for visualization purposes with vertical exaggeration of 16 feet. Results of the study revealed that majority of the study area lies in low-lying and very low-lying terrain below sea level. Policy recommendation in the form of the need to design and build a comprehensive Regional Information Systems (RIS) in the form of periodic inventorying, monitoring and evaluation with full support of the governments was made for the study area.

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Journal: Journal of Geographic Information System
DOI: 10.4236/jgis.2020.122009 (PDF)
Paper Id: 99945 (metadata)

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Determinants and Consequences of Intellectual Capital Efficiency in the U.S. Banking Industry

Authors: Justin Y. Jin, Wenting Wang

ABSTRACT
This study investigates the determinants and consequences of intellectual capital efficiency in the U.S. banking industry. We find that banks’ individual institutional memory of bad times reduces their intellectual capital efficiency. We also find that intellectual capital efficiency restricts banks’ risk-taking behaviors and enhances their accounting conservatism. Finally, we find that intellectual capital efficiency helps banks attract more wholesale funding deposits. In addition, we test the impact of three components of intellectual capital efficiency on bank accounting conservatism, and find that both human capital efficiency and relational capital efficiency significantly impact on bank accounting conservatism.

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Journal: Theoretical Economics Letters
DOI: 10.4236/tel.2020.102026 (PDF)
Paper Id: 99859 (metadata)

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Mathematical Modeling of Sucrose Hydrolysis with Product and Substrate Inhibition

Authors: Brunella Ascione, Rino Apicella, Vittorio Romano

ABSTRACT
In this work, the enzymatic hydrolysis reaction of sucrose through invertase under unsteady-state conditions has been investigated. The aim is to evaluate the inhibition phenomena influence on the reaction rate and, then, on the concentration and temperature profiles by simulating the process in a tubular reactor, varying the enzyme concentration and the reactant mixture velocity. The transport phenomena considered during the enzymatic hydrolysis process have been described by means of unsteady-state momentum, mass and energy balance equations, taking into account molecular and convective transport and generation terms. Interpretation and discussion of the results obtained by FEM resolution of PDEs involved allow to understand the relevance of the operating parameters.

Source:

Journal: Engineering
DOI: 10.4236/eng.2020.124023 (PDF)
Paper Id: 99835 (metadata)

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Energy Conservation in the Thin Layer Approximation: I. The Spherical Classic Case for Supernovae Remnants

Author: Lorenzo Zaninetti

ABSTRACT
The thin layer approximation applied to the expansion of a supernova remnant assumes that all the swept mass resides in a thin shell. The law of motion in the thin layer approximation is therefore found using the conservation of momentum. Here we instead introduce the conservation of energy in the framework of the thin layer approximation. The first case to be analysed is that of an interstellar medium with constant density and the second case is that of 7 profiles of decreasing density with respect to the centre of the explosion. The analytical and numerical results are applied to 4 supernova remnants: Tycho, Cas A, Cygnus loop, and SN 1006. The back reaction due to the radiative losses for the law of motion is evaluated in the case of constant density of the interstellar medium.

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Journal: International Journal of Astronomy and Astrophysics
DOI: 10.4236/ijaa.2020.102006 (PDF)
Paper Id: 99779 (metadata)

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