Journal of Positive Psychology and Wellbeing

Process Parameter Optimization in EDM using Ni Coated Electrode for MRR and Ra Using Taguchi Method and TOPSIS for Titanium Alloy

2024-03-12T04:38:41+00:00

Currently, using coated electrodes in EDM is a new technology, and the effectiveness of this technical solution in improving the EDM machining process has been proven by recently published results. However, research to determine the optimal set of process parameters in EDM with coated electrodes is very necessary, because it will contribute to improving the efficiency of using this technology in practice. In this article, the optimal process parameters in EDM with Nickel Coated Electrode for Ti-6Al-4V have been determined. The Topsis method is used to solve the multi-objective problem in this study. The problem experimental work was performed using Taguchi based L16 orthogonal to solve multi-objective optimization. The current (I), voltage (U) and pulse on time (Ton) were used as input response variables for investigation process while material removal rate (MRR) and surface roughness (SR) were selected as performance measures. The experimental results show that the optimal process parameters of the multi-objective decision problem in EDM with Nickel Coated Electrode include U = 40 V, I = 40 A, Ton = 1000 µs, resulting in an MRR of 0.028 mg/ min and an SR of 7.56 µm. The combination between TOPSIS and Taguchi method has contributed to reducing the time and cost of experimental research.

Stress as a Regulatory Variable of the Training and Psychoso-cial Profile of Undergraduate Students in Post COVID-19 era: A Systematic Review

2024-03-12T04:40:20+00:00

Stress is fundamental variable in human behavior. The aim of this systematic review is to carry out an analysis of the state of the art on stress in university students. To this end, a search was carried out in the Web of Science database for the descriptors "stress" and "undergraduate students". After applying the inclusion criteria, a total of 88 articles were selected. Interest in this variable has in-creased, motivated by the health situation derived from COVID-19. The results show stress interacts with socioeconomic variables, emotional intelligence, motivation and social skills of university students. Likewise, it is decisive in the face of addictions to mobile devices and narcotic substances.

Experimental Investigation of µEDM Process Parameters for Titanium Alloy with AlCrN Coated Electrode

2024-03-20T04:08:07+00:00

Micro Electric discharge machining (Micro-EDM) is a non-traditional machining method, and it is widely used in mold, tool and biomedical manufacturing. Therefore, research to clarify this technology in practice is very necessary. In this article, the influence of technological parameters in micro-EDM with coated electrodes on quality indicators is investigated. The experiments were performed on titanium alloy strip (Ti-6Al-4V) and AlCrN coated tungsten carbide rod served as electrode rod. The technology parameters used in the study include Voltage (V), Capacitance (C) and Spindle Rotation (RPM), and tool wear rate (TWR), overcut (OVC) and depth (Z co-ordinate) are the Quality indicators in research results. Taguchi method is used to design experiments, and ANOVA is used to analyze the results of quality indicators. They conclude that C has greater effect on multi-performance characteristics than U and RPM. Z co-ordinate, OVC and TWR were increased with the increase in U, and C increases have resulted in Z co-ordinate and TWR both increasing. The influence of RPM on OVC and TWR is similar.

Biopsychosocial Aspects Associated with Covid-19 of Pregnant Women who Delivered in Cipto Mangunkusumo General Hospital

2024-03-20T04:09:24+00:00

Introduction. The current outbreak of the novel coronavirus disease 2019 (COVID-19) has spread rapidly and become pandemic. This study aims to analyze the biopsychosocial aspects associated with COVID-19 who delivered in Cipto Mangunkusumo General Hospital (RSCM).

Methods. This is a descriptive observational cross-sectional study, included all pregnant women with confirmed COVID-19 who delivered in RSCM from March to December 2020. Data were collected from medical records and interviewing the subjects. Cases were analyzed for demographic, biophysical, psychological, and social aspects associated with COVID-19.

Result. We collected 183 patients with suspected COVID-19, and 37 patients were confirmed for COVID-19. Most pregnant women with COVID-19 infection have no comorbid before testing positive (65%). The outcome of both mothers and neonates was good with only 2.7% of mortality. From the psychological aspects, most subjects had sleep disturbance (53%), and 1 subject admitted suicide desire. From a social aspect, we observe the source of transmission through contact history and application of health protocols, only 30% of the subjects were known to have had contact with suspected or confirmed cases of COVID-19, and most of the subjects followed health protocol (72.2%).

Conclusion. The most common method of delivery was a cesarean section, with good clinical outcomes. Neonatal outcomes also had good clinical outcomes with most of the PCR results being negative. From the psychological aspects, most subjects had sleep disturbance. From the social aspect, most have not known to have contact with a suspected or confirmed case of COVID-19 and most of the subjects followed health protocol consistently.

Returns of Higher University Education in the Huánuco Region, Peru

2024-03-20T04:11:10+00:00

There is abundant theoretical and empirical literature that indicates that education plays a preponderant role in the economic and social development of a nation. Along these lines, many academics maintain that education helps to enhance the skills and abilities of individuals, resulting in more productive individuals in the workplace. The objective of the study was to estimate the returns of university higher education in the Huánuco region, Peru for the year 2014. The theoretical framework was Mincer's income model, which holds that a person's salary income depends on the years of study and work experience that he or she has, and based on this, the returns on education were estimated. Regarding the methodology, this study belongs to the quantitative approach, is applied, has an explanatory level and a non-experimental cross-sectional design. In particular, data from the 2014 National Survey of University Graduates and Universities implemented by the National Institute of Statistics and Informatics of Peru were used to estimate an econometric model called the Mincerian income equation. The results of the study show that there is a positive relationship between salary income, years of education and work experience of university professionals. From the estimation of the econometric model, it is found that an additional year of education tends to increase wage income by 13%, this value constitutes the return of university higher education in the Huánuco region.

Classroom Interventions During the COVID Pandemic: Impacts of Intervention Strategies for Students Benefit in Higher Education

2024-03-27T11:13:03+00:00

This article summarizes the results of a yearlong study designed to measure the impact of a education intervention course introduced as part of the general education curriculum at a university in Thailand. The study was conceived following the outbreak of the COVID epidemic. 369 total participants, 212 participants in the control group, and 157 participants in the experimental group. A pre-intervention and a post-intervention response were included for each participant; therefore, a total of 738 observations were included. It was hypothesized that the classroom intervention would, when compared to the control group, impact positively. This article argues that higher education and its consumers, students, are best served by an approach to learning that not only focuses on their cognitive capacities but also their mental well-being. Using intervention strategies to assist students cope and adapt to internal and external stressors while, allowing equipping them with tools to predict and thus head off negative stressors allows for better classroom performance and overall mental well-being.

Performance of Rice Cooperatives in the Vietnamese Mekong Delta: Initiatives for Sustainable and Organic-Oriented Agricultural Development

2024-03-27T11:14:23+00:00

Rice cooperatives are vital to the agricultural landscape of Vietnam's Mekong Delta, yet their performance and contributions to sustainable agriculture are not well understood. This study provides a comprehensive analysis using data from 135 rice cooperatives, employing multiple regression and logit model. The findings reveal uneven membership distribution despite significant social influence, with most cooperatives having fewer than 100 members. Charter capital varies widely and does not strongly correlate with membership numbers. Despite challenges in rice processing, cooperatives offer diverse services to enhance productivity and market access, with a notable focus on high-quality rice production (41.5% of surveyed cooperatives produce premium rice,) and contract farming (43.7% engage in contract farming). Regression analysis highlights the influence of service provision, annual profit, and contract farming on cooperative performance, stressing the need for strategic management, financial stability, and market-oriented approaches to drive success in Mekong Delta's rice cooperatives.

The Role of Knowledge and Talent Management in Honorary Teachers in Makassar

2024-03-27T11:15:52+00:00

This research is a development of the role of knowledge management, transformational leadership and Employee Engagement on the performance of Honorary Teachers from elementary to high school levels in the city of Makassar. The number of respondents who contributed to filling out the questionnaire during this research was 195 with locations of service as teachers divided into several schools in Makassar. Knowledge management is an important thing because its implementation requires follow-up from both parties, namely the organization and the teachers themselves, so it is very interesting to see this phenomenon occur. While transformational leadership is considered an elegant leadership model and is suitable in several types of organizations, this requires further proof. Meanwhile, employee engagement is an interesting issue because the composition of workers in the world of work today has entered various types of generations whose work culture has a different work perspective from previous generations. This research is a quantitative approach using SmartPLS 3.2.9 software. as a tool for managing existing data. The results of the research show that in terms of direct and indirect influence, all independent and dependent variables have an influence and are significant, while the role of the transformational leadership variable as a moderator of the relationship between knowledge management and performance is not able to strengthen this relationship. Based on this research, it can be said that the important role of knowledge management, transformational leadership and employee engagement of every honorary teacher can actually encourage good performance, so it is important to manage this matter well, existing knowledge, the right leadership model and the teacher's sense of attachment to the teacher. organization and work.

Utilitarian Value, Convenience, on Repurchase Intention Through Trust in Online Shop Users

2024-04-04T11:19:51+00:00

This study aims to analyze Utilitarian Value and Convenience of Repurchase Intention through Trust in Online Shop Users. Quantitative approach method is used in path analysis processed with Structural Equation Model (SEM). Validity tests and reliability tests will be carried out, then estimation tests and structural model fit tests. Based on the results of the structural model, this study found that Convenience had a significant impact on Trust. In other words, when online shop users found the shopping process convenient, it positively influenced their level of trust in the online shop. Additionally, Trust had a significant effect on Repurchase Intention. This means that when users had a higher level of trust in the online shop, they were more likely to intend to repurchase from that shop in the future. However, this study did not find any significant effects of Utilitarian Value on Trust, Utilitarian Value on Repurchase Intention, or Convenience on Repurchase Intention. This suggests that the perceived usefulness of the online shop and the convenience of the shopping experience did not directly impact users' trust or their intention to repurchase. The result of this study imply that the perceived benefits of efficiency and convenience alone may not be sufficient to influence customers' trust, repurchase intention, or perceived performance of an online shop. Factors such as trust, confidence in product selection, and the ability to acquire guaranteed products that align with purchasing power play a more crucial role in increasing repurchase interest for online consumers.

Using The (4mat) Model in Teaching The Triangles Similarity Unit For The Ninth Grade

2024-04-04T11:21:26+00:00

This study investigated the effectiveness of the 4mat model in teaching engineering and developing thinking skills and geometric tendencies among ninth-grade middle school students in "the triangles similarity unit". The study used a semi-experimental approach with 64 students divided into an experimental (32 students) and control group (32 students). The results revealed a statistically significant difference in the average scores of both groups for systemic thinking skills. Additionally, the post-application scores of the experimental group were higher than their pre-application scores. Therefore, the study concludes that the 4mat model is effective in enhancing thinking skills and geometric tendencies among ninth-grade students in "the triangles similarity unit". This study suggests that math teachers use 4mat model in their teaching practices and receive training on how to use it. The findings provide valuable insight into improving math education outcomes, and future studies could examine the 4mat model effectiveness in different contexts.

Running Head: The Mediating Role of Alexithymia in the Relationship between Insecure Attachment and Loneliness

2024-04-20T08:21:06+00:00

Attachment-related insecurities along with emotional processing difficulties, hamper the ability of individuals to acquire and maintain close relational bonds. Identification and expression of feelings enable individuals to form supportive and intimate interpersonal relationships, and serve a protective function against experiencing loneliness. This is particularly relevant in young adults, who experience important life transitions and their levels of loneliness show an upward trend, the last decades. This study aims to investigate associations between alexithymic characteristics and adult attachment orientations (anxiety and avoidance), as well as, the mediating role of alexithymia in the relationship between insecure attachment and loneliness. Our sample consisted of 379 Greek-speaking young adults, aged 18-25, who took part in an online survey and completed measures of attachment orientation, alexithymia and loneliness. Regression models indicated that both attachment anxiety and attachment avoidance were positively associated with alexithymia dimensions and consistently predicted higher level of loneliness. Results also revealed, that alexithymia partially mediated the effects of both attachment avoidance and attachment anxiety on participant’s levels of loneliness. The findings underline that individuals who have the capacity to understand and express their emotions can benefit from receiving emotional support and feel less lonely. Theoretical and practical implications, as well as, directions for future research are also discussed.