Past issues

Welcome to IJLERA! International Journal of Latest Engineering Research and Applications

Volume 07 - Issue 03 (March 2022)


Title:
Study on extraction Anthocyanin from red Artichokes (Hibiscus Sabdariffa Linn) and apply to produce fermented beverage
Authors:
Tran Thi Ngoc Linh, Nguyen Huu Phuoc Trang
Source:
International Journal of Latest Engineering Research and Applications, pp 01 - 09, Vol 07 - No. 03, 2022
Abstract:
Anthocyanin is a compound which dissolves in water and creates multicolor fruit. Anthocyanin has many precious biological activities such as: high antioxidant capacity, reduce the decline of resistance, antiinflammation, restrict the growth of cancer cells. Anthocyanin can be extracted in red artichokes with high concentrations.In this study, anthocyanin extracted and used to produce the biological active beverage that would enhance the value of red artichokes. Anthocyanin is extracted from red artichokes by water in experimental conditions as follows 800C of temperature, 100 minutes of extraction time, 1/160, g.ml-1 for the rate of dry materials and solvent, pH = 3.5. The results of fermentation study are as follows 2% of yeast extraction rate; pH = 4; 5 days of fermentation time for the highest quality beverage.
Keywords:
anthocyanin; red artichokes; fermented beverage; extraction; ferment.
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Title:
Steam turbine seal rub. History Case
Authors:
B. Fraga De Cal, P. Fraga López
Source:
International Journal of Latest Engineering Research and Applications, pp 10 - 19, Vol 07 - No. 03, 2022
Abstract:
This history case describes how vibration data provided by an advanced online analysis system helped identify the severity of vibrations experienced by a ship's propulsion steam turbine. In their machine plant they have a very advanced monitoring, but as far as vibrations are concerned, they only have an alarm system for vibration amplitude.
A few months after its commissioning, after a scheduled shutdown for preventive maintenance, in which the optimal conditions of that steam turbine were rehabilitated, it began to present brief periods of high vibration. These high vibration peaks appeared little by little, more and more frequently and with greater amplitude. In August 2002, the observed vibration approached the turbine's safety firing limits. Considering the indicated measures, the operators and maintenance personnel decided to wait until the next arrival at port to turn off the turbine and face the solution of these problems. The turbine continued in operation for about a month, in which they continued to observe occasional periods of high vibration.
In October 2002, already in port, the turbine was dismantled and inspected. The findings indicated that the reason for the vibration spikes was due to the oil injected into the sealing shutter, which was carburized and caused a friction of the turbine shaft sporadically. The oil had seeped through the oil mazes of that shutter, which had worn unevenly due to misalignment.
Keywords:
Vibrations, rotating systems, misalignment, rubs.
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Title:
Tactics, Techniques and Procedure to Avoid Harmful AI: Exploring Web Search Queries
Authors:
Ayse Kok Arslan
Source:
International Journal of Latest Engineering Research and Applications, pp 20 - 26, Vol 07 - No. 03, 2022
Abstract:
AI models are now capable of performing a very wide range of tasks, often out of the box. In order to prevent malicious mis-use of AI models, developers can think in terms of traditional security risk assessment frameworks, which outline key steps such as identifying threats and potential impacts, assessing likelihood, and determining risk as a combination of likelihood and impact. This study provides a synthesis of different AI-centric perspectives towards the capabilities for a world with AI and explores the use-cases for an API user to achieve respectful behavior by focusing on Web search queries.It explores trends towards pre-trained data representations in AI model, to be applied in increasingly flexible and task-agnostic ways. The paper concludes that in order to inform appropriate policy interventions, the mindset should be expanded from code generation to other modalities.
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Title:
Reliability and Validity of the Self-Esteem Scale in Greek Educational Context
Authors:
Karapanagiotou A., Rokka St., Filippou F., & Bebetsos E
Source:
International Journal of Latest Engineering Research and Applications, pp 27 - 31, Vol 07 - No. 03, 2022
Abstract:
The aim of this research was to confirm the Greek version of the Rosenberg Self-esteem Scaleon Middle School students and to explore gender and age (class attendance) as factors that differentiate self-esteem. The internal consistency has also been examined. The survey involved 160 male and female school students. The scale consisted of ten (10) items in total, out of which five (5) measure the positive and five (5) the negative emotions of participants. Data analysis included among others: descriptive and inferential statistics, confirmatory factor analysis, reliability analysis, discriminant and convergent validity, t-test for independent sample, and one-way ANOVA analysis. The results of the confirmatory factor analysis demonstrated that the hypothesized model produced a significant χ2 (134.75), normed fit index (.90), and comparative fit index (.92). The root mean square error of approximation (.59) has also been considered to assess the degree of fit of the model. Composite reliability (> .919) and variance extracted (> .533) of the Self-esteem Scale demonstrated an acceptable reliability coefficient. Results analysis revealed the following conclusions: a. The Rosenberg's Self-esteem Scale in its Greek adaptation for ages 12-15 consists of only one factor that examines overall self-esteem. b. Gender does not differentiate self-esteem at these ages. c. The attendance class does not differentiate the self-esteem of high school students.
Keywords:
middle school; anxiety; self-confidence; body image.
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