The Factors Impact on Employee Satisfaction in Work at Vietnamese Garment Enterprises

Authors: Hoang Thanh Tung, Nguyen Thi Van Anh, Pham Thi Thuy Anh

ABSTRACT
This research is to identify and assess the factors that impact an employee’s satisfaction in work. The company selected for this research is a leading garment company of the Vietnamese textile and garment industry. With the survey and analyzing the opinion of 318 workers, the research results indicated six groups of elements (variables) in work which have impacted on the staff’s satisfaction: wages and welfare, working conditions, relations with superiors, relations with colleagues, training and promotion opportunities, nature of work. These six-factor groups were measured by 27 observed variables. The analysis and evaluation of factors affect the satisfaction of employees in order to contribute practically to the setting up and implementation of effective measures to enhance job satisfaction for employees, create motivate labor and bring the higher labor productivity.

Source:

Journal: Open Journal of Business and Management
DOI: 10.4236/ojbm.2019.72045(PDF)
Paper Id: 91617 (metadata)

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Experimental Investigation of Fluid Mixing Process with Newly Designed Conduit-Type Mixer and Fin-Type Mixer

Authors: Md. Tauhedul Azam, Donghyuk Kang, Hiroyuki Hirahara, Kazuhisa Murata, Yasufumi Shimoji

ABSTRACT
In the present paper, fluid mixing process in a stirred tank with a newly designed conduit-type mixer has been investigated by the flow visualization and the concentration measurement. The results of the new conduit-type mixer are compared with a conventional fin-type mixer. Although the concentration measurement indicates that the mixing time by the conduit-type mixer is slightly longer than that by the fin-type mixer, the flow visualization shows that the conduit-type mixer generates the wider circulatory flow pattern and stirs the fluid over a vast area of the tank. Consequently, it is indicated that the conduit-type mixer has an advantage to stir the fluid uniformly in space.

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Journal: Journal of Flow Control, Measurement & Visualization
DOI: 10.4236/jfcmv.2019.72008(PDF)
Paper Id: 91606 (metadata)

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Vane Shear Footing-Integrated Rational Approach for Seismic Bearing Capacity of Foundations & Seismic Pressure

Authors: B. Bikas Maiti, Dr. Ajayswarup

ABSTRACT
Structural buildings are subjected to huge cyclic powers during earthquakes. The structural failures during seismic events notably impact a variety of facets of buildings within tolerable levels like sustainable strength and stable energy dissipation capability to sustain inter-story drifts and overall structural damages. The major structural elements such as columns, beams and soil shearing capacities are majorly affected during seismic events. Buildings situated in the earthquake prone zone are exposed to most concerns in the structural design. Boreholes are also one of the main factors responsible for seismic waves and soil shearing. Shear strength is a term used in soil mechanics to describe the magnitude of the shear stress that soil can sustain, especially selected BC soil. The shear resistance of soil is a result of friction and interlocking of particles, and possibly cementation or bonding at particle contacts. Soils consist of individual particles that can slide and roll relative to one another. Shear strength of a soil is equal to the maximum value of shear stress that can be mobilized within a soil mass without failure taking place. In many parts of the world to avoid or control these consequences, buildings have been constructed as steel-composite structures. However, in India, buildings are being constructed as RCC framed structures. Here a novel combination of VANE shear footing and BRB method has been introduced. In this article, the effects of boreholes increase seismic bearing capacity of foundation, and load bearing capacity to balance seismic pressure.

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Journal: Open Journal of Earthquake Research
DOI: 10.4236/ojer.2019.82004(PDF)
Paper Id: 91586 (metadata)

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Irreducible Polynomials in Ζ[x] That Are Reducible Modulo All Primes

Author: Shiv Gupta

ABSTRACT
The polynomial x4+1 is irreducible in Ζ[x] but is locally reducible, that is, it factors modulo p for all primes p. In this paper we investigate this phenomenon and prove that for any composite natural number N there are monic irreducible polynomials in Ζ[x] which are reducible modulo every prime.

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Journal: Open Journal of Discrete Mathematics
DOI: 10.4236/ojdm.2019.92006(PDF)
Paper Id: 91574 (metadata)

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Android Security and Its Rooting—A Possible Improvement of Its Security Architecture

Authors: Nick Rahimi, John Nolen, Bidyut Gupta

ABSTRACT
The advent of technology brought forth a myriad of developments that have streamlined the manner through which people operate. With the growing need to be at the forefront of communication and information, people have resorted to the use of mobile phones with a great percentile preferring android oriented systems. Similarly, the systems are susceptible to the various threats posed by technology with due summations showing that security flaws and unauthorized access to sensitive data pose a huge threat to the overarching efficacy of the android systems. The research presented lays a primal focus on how users can improve intrinsic android features through the use of Google services, rooting, custom kernels and ROM techniques. The research also focused on how Android security features can be improved when using or installing applications. Results indicate that the rooting process is the most conclusive and safest scheme. Summations drawn are indicative of the fact that system security is a moot research topic that requires further research into how it can be improved.

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Journal: Journal of Information Security
DOI: 10.4236/jis.2019.102005(PDF)
Paper Id: 91560 (metadata)

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The Impact of Subungual Osteochondroma Deformans on Severely Mycotic Toenails

Authors: Christopher Brian Stewart, Maryellen Ann Waltz

ABSTRACT
Background: We examined 94 toenails exhibiting clinical signs of severe onychomycosis taking into account multiple contributing factors, not the least of which was Subungual Osteochondroma Deformans (SOD). We hypothesize that SOD plays a significant role in both the etiology and treatment of onychomycosis. Methods/Results: A retrospective post-treatment outcome analysis was performed comparing two groups of severely mycotic toenails. The first group of 25 fungal nails showed 54.31% improvement following treatment by both surgical nail avulsion and a 1064 YAG laser-based Nail Restoration algorithm. The second group of 69 fungal nails was not only treated using the same nail avulsion/laser-based algorithm but was also evaluated for SOD lesions which were surgically removed when present, resulting in 95.31% improvement. The overall incidence of SOD lesions in the second group of severely mycotic toenails was 73.91%. Conclusion: We submit that at 73.91% Subungual Osteochondroma Deformans has an under-reported and under-appreciated association with toenail fungus. Generally, we find that our success rates in treating severe toenail fungus using our laser-based Nail Restoration Protocols are much higher when SOD lesions are surgically removed.

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Journal: Journal of Cosmetics, Dermatological Sciences and Applications
DOI: 10.4236/jcdsa.2019.91005(PDF)
Paper Id: 91521 (metadata)

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Comparative Study of Linear and Non-Linear Controls of Three-Phase Shunt Active Filters for Improving the Quality of Electrical Energy

Authors: Mamane Adamou, Nabil Alkassoum, André Foulani, Amadou Seidou Maiga

ABSTRACT
The aim of this work is to comparatively study two types of control of a three-phase shunt active filter (TSAF) in order to realize a system of depollution of electrical networks so as to improve the quality of electrical energy. We used two TSA control models which differ in the method of disturbed currents detection, one linear and the other non-linear. The results show that the non-linear control method, although with high calculation blocks, gives more promising results than the linear control method. When connecting a non-linear load (televisions, lamps, variable speed drives, etc.) directly to the public distribution network, the non-linear nature of the load causes the source current to be deformed due to the presence of harmonic currents and voltages. These harmonics thus generate a high reactive power, and therefore considerable electrical losses in the network. One of the solutions to reduce losses on the electricity grid is to incorporate an electronic circuit called a filter into the electricity grid. This work carried out a comparative study of two types of control of a three-phase shunt active filter (TSAF) in order to carry out a system for cleaning up electricity networks in order to improve the quality of electrical energy. We used two TSA control models that differ in the method of detecting disturbed currents, one linear and the other non-linear. The results show that the non-linear control method, although with high calculation blocks, gives better results than the linear control method.

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Journal: Energy and Power Engineering
DOI: 10.4236/epe.2019.113009(PDF)
Paper Id: 91468 (metadata)

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Experimental Investigation of Laser Welding Process in Overlap Joint Configuration

Authors: Kamel Oussaid, Abderrazak El Ouafi, Ahmed Chebak

ABSTRACT
This paper presents an experimental investigation of laser overlap welding of low carbon galvanized steel. Based on a structured experimental design using the Taguchi method, the investigation is focused on the evaluation of various laser welding parameters effects on the welds quality. Welding experiments are conducted using a 3 kW Nd:YAG laser source. The selected laser welding parameters (laser power, welding speed, laser fiber diameter, gap between sheets and sheets thickness) are combined and used to evaluate the variation of three geometrical characteristics of the weld (penetration depth, bead width at the surface and bead width at the interface). Various improved statistical tools are used to analyze the effects of welding parameters on the variation of the weld quality and to identify the possible relationship between these parameters and the geometrical characteristics of the weld. The results reveal that the reached hardness values are similar for all the experimental tests and all welding parameters are relevant to the weld quality with a relative predominance of laser power and welding speed. The effect of the gap is relatively limited. The investigation results reveal also that there are many options to consider for building an efficient welds quality prediction model. Results achieved using an artificial neural network based simplified model provide an indication of the prediction model performances.

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Journal: Journal of Materials Science and Chemical Engineering
DOI: 10.4236/msce.2019.73002(PDF)
Paper Id: 91438 (metadata)

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Associated Risks in Mobile Applications Permissions

Authors: Mohammed Al Jutail, Mousa Al-Akhras, Abdulaziz Albesher

ABSTRACT
Mobile applications affect user’s privacy based on the granted application’s permissions as attackers exploit mobile application permissions in Android and other mobile operating systems. This research divides permissions based on Google’s classification of dangerous permissions into three groups. The first group contains the permissions that can access user’s private data such as reading call log. The second group contains the permissions that can modify user’s data such as modifying the numbers in contacts. The third group contains the remaining permissions which can track the location, and use the microphone and other sensitive issues that can spy on the user. This research is supported by a study that was conducted on 100 participants in Saudi Arabia to show the level of users’ awareness of associated risks in mobile applications permissions. Associations among the collected data are also analyzed. This research fills the gap in user’s awareness by providing best practices in addition to developing a new mobile application to help users decide whether an application is safe to be installed and used or not. This application is called “Sparrow” and is available in Google Play Store.

Source:

Journal: Journal of Information Security
DOI: 10.4236/jis.2019.102004(PDF)
Paper Id: 91412 (metadata)

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Silicon Deposition in Leaf Trichomes of Cucurbitaceae Horticultural Plants: A Short Report

Author: Jun Abe

ABSTRACT
Silicon deposition in leaf trichome of six horticultural Cucurbitaceae species, cucumber (Cucumis sativus), pumpkin (Cucurbita maxima), melon (Cucumis melo), watermelon (Citrullus lanatus), sponge gourd (Luffa cylindrica) and bottle gourd (Lagenaria siceraria var. hispida) was observed by an X-ray microanalyzer coupled with an environmental scanning electron microscope. The elements that presented in the surface of three or four leaves of the individual species were detected and mapped by the X-ray microanalyzer. In leaves of cucumber, pumpkin, and melon, high accumulation of silicon was detected in cells surrounding the bases of the trichome hair and the hair itself deposited calcium. On the other hand, in sponge gourd and bottle gourd, high accumulation of silicon was detected only in the hair. In watermelon leaves, silicon deposited both in the hair and in cells surrounding the bases of the hair. Thus, horticultural Cucurbitaceae plants have interspecific variation in the pattern of silicon deposition in leaf trichomes.

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Journal: American Journal of Plant Sciences
DOI: 10.4236/ajps.2019.103034(PDF)
Paper Id: 91384 (metadata)

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