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All Journal Journal of Community Service and Engagement Asean International Journal of Business International Journal of Innovation in Mechanical Engineering and Advanced Materials Jurnal Pengabdian Masyarakat Nasional

Rini Anggraini

Universitas Mercu Buana

Author-ID : 4057196

Humanities Automotive Engineering Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Energy Engineering Materials Science & Nanotechnology Mechanical Engineering Other

Published : 9 Documents Claim Missing Document

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Articles

Edukasi Pemilahan Sampah Rumah Tangga Sebagai Penghasilan Tambahan Warga Kecamatan Setu Hayu Kartika; Candra Setia Bakti; Popy Yuliarty; Rini Anggraini
Journal of Community Service and Engagement Vol. 1 No. 02 (2021): October 2021
Publisher : CV. AGUSPATI RESEARCH INSTITUTA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9999/jocosae.v1i02.20

Kegiatan ini dilakukan dilingkungan perumahan, maksud kegiatan ini adalah untuk mengedukasi warga di kelurahan babakan kecamatan setu kota tangerang selatan. Kegiatan ini dilakukan atas dasar banyaknya sampah rumah tangga yang hanya terbuang begitu saja. Hasil sampah yang dihasilkan dari rumah tangga sebenarnya dapat dikumpulkan dan dilakukan pemilahan secara mandiri serta dapat dijadikan penghasilan tambahan warga dan dapat dimanfaatkan kembali. Hasil dari kegiatan edukasi ini diharapkan warga atau masyarakat sadar serta memiliki pengetahuan mengenai pemilhan sampah ini dan diharapkan masyarakat mempunyai kontribusi dalam mengurangi jumlah sampah rumah tangga khususnya di lingkungan kecamatan setu.

WATERMELON PEEL EXTRACT AS GREEN CORROSION INHIBITOR FOR ST-37 CARBON STEEL IN SEAWATER Sri Teguh Priharti; Umar Kalmar Nizar; Rita Sundari; Sri Benti Etika; Budhi Oktavia; Ananda Putra; Rini Anggraini
International Journal of Innovation in Mechanical Engineering and Advanced Materials Vol 3, No 3 (2021)
Publisher : Universitas Mercu Buana, Prodi S2 Teknik Mesin

Corrosion engineering has taken great interest in many industries that required high cost management to overcome the serious problems. This work has investigated the role of watermelon peel extract as green inhibitor to protect carbon steel in seawater. This investigation has studied the corrosion rate and inhibition efficiency applying weight loss method. The laboratory result shows the optimum inhibition efficiency found to be 71.64% at 5% inhibitor concentration in 100 ml seawater at room temperature. The effects of temperature and immersion time on inhibition efficiency have also been examined. This study has used Arrhenius equation based on activation energy to determine type of adsorption encountered with corrosion process. The result shows a chemical adsorption justified by its high adsorption heat and strengthened by FTIR and UV-Vis examinations. The phytochemical examination of watermelon peel extract gives positive response to flavonoid, alkaloid, and saponin. The finding is useful for many industries encountered with carbon steel corrosion in corrosive medium using green inhibitor.

A BRIEF REVIEW ON CRYOGUN MACHINE FOR PRE-CERVICAL CANCER HEALING Aji Bagaskara; Rita Sundari; Rini Anggraini
International Journal of Innovation in Mechanical Engineering and Advanced Materials Vol 3, No 1 (2021)
Publisher : Universitas Mercu Buana, Prodi S2 Teknik Mesin

Cervical cancer is generally found in women of all ages due to virus infection on epithelial cells of female cervix. It is known that a certain type of Human Papilloma Virus (HPV) is suspected to cause cervix cancer in women from various ethnics. Several therapies have been used to cure cancer diseases like cone biopsy, laser treatment, electrosurgical excision, thermocoagulation, ablation therapy, and cryotherapy. This paper has highlighted on the role of cryogun machine applied in cryotherapy for pre-cervical cancer treatment in relation to freezing technique using liquid nitrogen to kill cancer cells on infectious area.

STUDY ON PARAMETERS IN COUNTER CURRENT DOUBLE PIPE HEAT EXCHANGER APPLYING CIRCULAR TURBULATOR Sudiono Sudiono; Rita Sundari; Rini Anggraini
International Journal of Innovation in Mechanical Engineering and Advanced Materials Vol 3, No 2 (2021)
Publisher : Universitas Mercu Buana, Prodi S2 Teknik Mesin

Many industries dealing with manufacturing and HVAC (heating, ventilation, and air cooling) are rely heavily on thermodynamics principles with respect to heat and mass transfer. The objective of this study is to do optimization to yield optimum heat transfer rate and minimized pressure drop with regard to number of circular turbulator (CT) and water debit on Nusselt number (Nu) in counter current double pipe heat exchanger. This work has applied the classical rule of thermal science dealing with Nusselt number in relation to convection and conduction of heat transfer rate due to temperature effect. The result shows the highest Nu found to be 835.3 at 5 CT and water debit of 9 L/min. The addition of CT number gives effect on fluid current due to vortex generation. This study also investigates the effect of CT number on friction coefficient that the friction coefficient of a heat exchanger in the absence of CT is lower than that in the presence of CT. For any CT number, the friction coefficient is reduced with increasing water debit. The study has also found that the thermal performance ratio has achieved higher values for heat exchanger in the absence of CT.

CFD SIMULATION OF PRESSURIZATION SYSTEM IN FIRE STAIRS WTC 6 BUILDING Salahudin Arif; Rita Sundari; Rini Anggraini
International Journal of Innovation in Mechanical Engineering and Advanced Materials Vol 3, No 2 (2021)
Publisher : Universitas Mercu Buana, Prodi S2 Teknik Mesin

Pressurization system in fire stairs is required for high-rise building for safety evacuation in fire attack. This paper has highlighted on the problem of WTC 6 high-rise building with 18 floors related to safety evacuation in fire attack. In real situation, the minimum air pressure (12.5 Pa) at closed condition and minimum air velocity (1 m/s) at open door chamber in fire stairs as stated in the SNI 03-6571-2001 requirements are not fulfilled by the WTC 6 high-rise building. Therefore, a CFD (Computational Fluid Dynamics) simulation has been used to overcome the problems. The CFD results show that volumetric air flow rate of 7.24 m3/s injected to fire stairs in multiple injection system yielded pressure difference of 39.5–44.7 Pa and air velocity of 1.1–1.2 m/s. The CFD simulation implemented in real situation yields air pressure difference of 38.2 Pa in closed condition and air velocity in open door chamber of 1.16 m/s assumed to solve the problem.

MATERIAL SELECTION OF PROPOSED AIR RECEIVER TANK APPLIED FOR ELECTRICAL GENERATOR Reza Kamaludin; Rita Sundari; Agus Sudarsono; Rini Anggraini
International Journal of Innovation in Mechanical Engineering and Advanced Materials Vol 4, No 3 (2022)
Publisher : Universitas Mercu Buana, Prodi S2 Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/ijimeam.v4i3.19248

Air receiver tank in electrical generator used as pressured air vessel is mainly consisted of shell cylinder and head part. This work has searched for the more suitable material to be used for the shell and head of the proposed air receiver tank because the older material (SPV 355) has some limitations. This study has been conducted based on several parameters in standard references. The calculations have applied relevant technical formulas such as corrosion factor, thickness design, and Maximum Allowable Working Pressure (MAWP). There are three types of selected materials available that are expected to yield similar previous condition parameters addressing to operational pressure 10 bar and temperature 40oC, i.e., SA-36 (Type I), SA-516 Gr 70 (Type II), and SS-304 (Type III). The economic factor is also taken into consideration. Considering the economic cost and mechanical characteristics, finally the material of Type II is selected to be the most appropriate material to replace SPV 355 material for the proposed air receiver tank. In the upcoming, this study is useful for the knowledge of material design.

EFFECT OF SiO2 AND ZnO NANOPARTICLES TO INCREASE REFRIGERATION MACHINE PERFORMANCE Dandi Irwansyah; Rita Sundari; Rini Anggraini; Khuzaimah Arifin
International Journal of Innovation in Mechanical Engineering and Advanced Materials Vol 5, No 2 (2023)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/ijimeam.v5i2.21859

In this investigation, the impact of silicon dioxide (SiO2) and zinc oxide (ZnO) nanoparticles on the performance of a refrigeration machine system was systematically examined. The focus was on evaluating the coefficient of performance (COP) concerning the utilization of a polyolester (POE) lubricant, R600a refrigerant, and distinct nanoparticles (SiO2 and ZnO) within the refrigeration system. The nanoparticles were individually introduced into the R600a refrigerant in masses of 0.5 g, 1.0 g, and 1.5 g. The experimental outcomes demonstrated a noteworthy enhancement in COP with the addition of nanoparticles. Specifically, the introduction of 1.5 g of SiO2 resulted in a substantial increase of 25.88% in COP, marking it as the most influential dosage. Similarly, the addition of 1.0 g of ZnO led to a significant COP increase of 13.6%, representing the optimal quantity for ZnO. Furthermore, the inclusion of 1.5 g of SiO2 brought about a remarkable reduction in energy consumption, with a decrease of 25.58%, while 1.5 g of ZnO resulted in a notable 16.28% decrease in energy consumption. The experimental configuration involved the use of 20 g of refrigerant and 500 ml of POE lubricant. Comparative analysis demonstrated that the refrigeration system incorporating nanoparticles outperformed the conventional R600a refrigeration system devoid of nanoparticles. This study contributes valuable insights into the potential enhancements in refrigeration system efficiency through the strategic incorporation of SiO2 and ZnO nanoparticles, offering a promising avenue for optimizing the performance of refrigeration technology.

PELATIHAN PEMBUATAN SHAMPO DI RPTRA KELURAHAN MERUYA SELATAN Popy Yuliarty; Rini Anggraini
Jurnal Pengabdian Masyarakat Nasional Vol 3, No 1 (2023)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/pemanas.v3i1.20053

The rapid development of social media has a positive impact on human life, one of which is encouraging business opportunities in all fields such as making it easy to achieve product marketing. This development provides an opportunity for anyone to do business and market it through social media, this is what prompted the service team to provide training on making shampoo through a home business that can be done by all levels of society. Hair is a crown for humans, especially for women. Shiny, clean, fragrant and healthy hair is every woman's dream. Shampoo is a product that can help make this happen. Given the easy process of making this shampoo, knowledge about making this shampoo needs to be disseminated, because apart from making people smarter, it can also motivate people to become entrepreneurs, especially since shampoo is a primary need that is evenly distributed in all levels of society. Shampoo-making training is expected to broaden the horizons of mothers and young women and can be a provision for them to do entrepreneurship, which if pursued will be able to help the family's finances. This training has been carried out well at RPTRA Menara and received positive responses from the participants.

How Transformational Leadership and Competency Supporting Employee Performance: Role of Achievement Motivation as Mediation Rini Anggraini; Singmin Johannes
Asean International Journal of Business Vol. 3 No. 1 (2024)
Publisher : Asosiasi Dosen Peneliti Ilmu Ekonomi dan Bisnis Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54099/aijb.v3i1.830

This research aims to analyze the influence of transformational leadership and competence on employee performance as mediated by achievement motivation in government agencies. The total population in this study was 354 employees using a purposive sampling technique with the criteria being permanent employees who had worked for more than 1 year, so the sample size was 188 employees. The data sources used are primary data obtained directly in the field such as interviews, observations and questionnaires as well as secondary data obtained from literature studies through journals, documentation, books and others. The data analysis method in this research uses Partial Least Square (PLS) with the help of SmartPLS 3.2.9 software. The results of this research show that: 1) Transformational Leadership has a positive and significant effect on employee performance at the Deputy for Corruption Eradication Commission, 2) Transformational Leadership has a positive and significant effect on Achievement Motivation, 3) Competency has a positive and significant effect on Employee Performance, 4) Competency has a positive effect and significant to Achievement Motivation, 5) Achievement Motivation has a positive and significant effect on Employee Performance, 6) Transformational Leadership has a positive and significant effect through Achievement Motivation on Employee Performance, 7) Competence has a positive and significant effect through Achievement Motivation on Employee Performance.

Co-Authors Agus Sudarsono Aji Bagaskara Ananda Putra Budhi Oktavia Candra Setia Bakti Dandi Irwansyah Hayu Kartika Khuzaimah Arifin Popy Yuliarty Reza Kamaludin Rita Sundari Salahudin Arif Singmin Johannes Sri Benti Etika Sri Teguh Priharti Sudiono Sudiono Umar Kalmar Nizar

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