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Asian Journal of Science, Technology, Engineering, and Art
Published by Lembaga Yasin Alsys
ISSN : 30255287     EISSN : 30254507     DOI : https://doi.org/10.58578/AJSTEA
Core Subject : Science, Art, Social, Engineering,
Arts Computer Science & IT Engineering Social Sciences
Asian Journal of Science, Technology, Engineering, and Art [3025-5287 (Print) and 3025-4507 (Online)] is a double-blind peer-reviewed, and open-access journal to disseminating all information contributing to the understanding and development of Science, Technology, Engineering, and Art. Its scope is international in that it welcomes articles from academics, researchers, graduate students, and policymakers. The articles published may take the form of original research, theoretical analyses, and critical reviews. AJSTEA publishes 6 editions a year in February, April, June, August, October and December. This journal has been indexed by Harvard University, Boston University, Dimensions, Scilit, Crossref, Web of Science Garuda, Google Scholar, and Base. AJSTEA Journal has authors from 5 countries (Indonesia, Nigeria, Pakistan, Nepal, and India).
Arjuna Subject : Umum - Umum
Articles 226 Documents
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Sintesis Pigmen Merah Hematit (α-Fe2O3) dari Pasir Besi dengan Metode Kopresipitasi dan Hidrotermal: A Review Lestari, Destriani Umi
Asian Journal of Science, Technology, Engineering, and Art Vol 1 No 2 (2023): Asian Journal of Science, Technology, Engineering, and Art
Publisher : Darul Yasin Al Sys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/ajstea.v1i2.2036

Abstract

The purified natural iron sand contains magnetic dioxide particles to produce ferric ions (Fe3+) which can be used as precursors for the synthesis of the red pigment hematite. Hematite red pigment synthesis was carried out by coprecipitation method with NaOH precipitating agent and hydrothermal.The optimum pH of the hematite red pigment synthesis reaction using the coprecipitation method is pH 6. At pH 6 it will produce a hematite red pigment with higher brightness. By the hydrothermal method Fe3O4 added 50 mL HCl (12,063 M) in a beaker. The filtrates are added boric acid with varying concentrations of 0.1 M; 0.3 m; 0.5 M and 1.0 M at a volume ratio of 1:1. Gradually the solution is supplemented with NH4OH 6 M until a solution with a pH of 8 is obtained at a constant temperature of 70oC. The formed precipitate is put in the microwave for 10 minutes with a pressure of 90P. The characterization was carried out using XRD to see the crystal structure of the product and UV-Vis to see the absorption wavelength.und is the anatase phase.
Identifikasi Mikroplastik Polyethylene (PE) Menggunakan Digesting Wet Peroxide Oxidation (WPO) Fitriandoni, Adisty; Dewata, Indang
Asian Journal of Science, Technology, Engineering, and Art Vol 1 No 2 (2023): Asian Journal of Science, Technology, Engineering, and Art
Publisher : Darul Yasin Al Sys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/ajstea.v1i2.2037

Abstract

The extraction method using Wet Peroxide Oxidation (WPO) is a digestion method for separating microplastic particles and other organic/inorganic precipitation, with a liquid oxidation process using peroxide and iron salts as catalysts. Polyethylene (PE) is a type of plastic that pollutes the environment due to its high level of use in the packaging sector. The aim of this research is to determine the optimum conditions for the Wet Peroxide Oxidation (WPO) extraction method and obtain an effective method for identifying microplastics. Variations in oven temperature are 70⁰C, 80⁰C, 90⁰C, 100⁰C, and 110⁰C; variations in Fe(II) concentrsation 0.025 M, 0.05 M, 0.075 M, 0.1 M, and 0.125 M; heating temperature variations 30⁰C, 45⁰C, 60⁰C, 75⁰C, and 90⁰C. The research results showed that the optimum oven conditions occurred at a temperature of 90⁰C producing a microplastic mass of 0.5943 grams, the optimum Fe(II) concentration of 0.1M produced a mass of 1.2966 grams, the optimum heating temperature occurred at 60⁰C producing a mass of 0.7128 grams. For samples, characterization using FTIR showed that no new groups were formed after being treated under optimal conditions. Meanwhile, for XRF, no impurity elements were identified after the sample was treated with optimum conditions.
Efek Penambahan Diethanolamine dan Suhu Kalsinasi terhadap Energi Gap Lapisan Tipis CuSnO3 Sukma, Vira Ananda; Sanjaya, Hary
Asian Journal of Science, Technology, Engineering, and Art Vol 1 No 2 (2023): Asian Journal of Science, Technology, Engineering, and Art
Publisher : Darul Yasin Al Sys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/ajstea.v1i2.2045

Abstract

This study focuses on the synthesis of CuSnO3 thin films using the sol-gel dip coating method, with a particular emphasis on the effects of diethanolamine (DEA) addition and calcination temperature on the bandgap energy. The successful addition of DEA significantly influenced the reduction of the bandgap energy of CuSnO3 thin films, decreasing from 3.21 eV (without DEA) to 2.11 eV (optimal DEA addition, 1.5 mL), as characterized by UV-DRS. Furthermore, different calcination temperatures yielded varying bandgap energies, with the lowest bandgap energy observed in samples calcined at 550°C. This research provides valuable insights into the manipulation of CuSnO3 thin film properties for potential applications in optoelectronic devices and other emerging technologies.
Pengaruh Aditif Monoethanolamine (MEA) terhadap Struktur Kristal Copper Tin Oxide Yulfitrianti, Marlina; Sanjaya, Hary; Budiman, Septian
Asian Journal of Science, Technology, Engineering, and Art Vol 1 No 2 (2023): Asian Journal of Science, Technology, Engineering, and Art
Publisher : Darul Yasin Al Sys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/ajstea.v1i2.2046

Abstract

Solar cell technology is a technology that can create electrical energy using semiconductor devices that have p-n connections. Copper tin oxide CuSnO3 (CSO) is an amorphous oxide semiconductor with a band gap of 2.0–2.5 eV. The method used is sol gel with the addition of one of the commonly used additives, namely Monoethanolamine (MEA). This research aims to determine the effect of monoethanolamine additives on the crystal structure of Copper Tin Oxide using the Sol Gel method. This research is quantitative research by collecting data from previous research and then conducting research using specified methods and objects. The results of research using XRD showed particle sizes ranging from 40.10 – 50.02 nm and the results obtained without additives were 21.06 nm. This is because the addition of additives greatly influences the crystal size and crystal Structure.
Pengaruh Variasi Monoethanolamine dan Jumlah Pelapisan terhadap Band Gap Lapis Tipis CuSnO3 Nengsi, Suharti; Sanjaya, Hary
Asian Journal of Science, Technology, Engineering, and Art Vol 1 No 2 (2023): Asian Journal of Science, Technology, Engineering, and Art
Publisher : Darul Yasin Al Sys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/ajstea.v1i2.2047

Abstract

This study investigated a thin layer of CuSnO3 synthesized through sol-gel dip-coating method with variations in the addition of monoethanolamine. The results revealed that the addition of monoethanolamine by 1 ml reduced the band gap value to 2.2 eV, while the thin layer without the addition of monoethanolamine had a band gap value of 3.1 eV. In addition, the variation in the number of coatings also affects the band gap, where a maximum value of 2.1 eV is obtained with 2 times of coating. These results highlight the importance of monoethanolamine addition and coating amount in regulating the optical properties of CuSnO3 thin layers. The large amount of coating causes an increase in the band gap value and the addition of Monoethanolamine affects the CuSnO3 band gap value.
Ergonomic Risk Assessment for Musculoskeletal Disorders among Ultrasonologists of Peshawar: A Cross- Sectional Survey Zia, Huma; Rehman, Muheebur;  Khan, Sitara Hayat; Aman, Saba; Tahreem, Shumaila
Asian Journal of Science, Technology, Engineering, and Art Vol 1 No 2 (2023): Asian Journal of Science, Technology, Engineering, and Art
Publisher : Darul Yasin Al Sys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/ajstea.v1i2.1869

Abstract

Background: Ergonomics is the study of analyzing the demands of a task and aligning them with the abilities of the worker to establish an optimal work environment that minimizes the likelihood of injuries while maximizing efficiency. In safety and ergonomic literature, risk factors and consequent risks are common conceptions. Ergonomics has an impact on the adapted posture of workers developed due to the demand of their work procedure. Disorders related to bad posture and usage of different equipment and tools in a workplace can be solved through better ergonomics. Objective: To determine the ergonomic risk assessment for musculoskeletal disorders among Ultrasonologists of Peshawar. Methods: A cross-sectional study was conducted on a total of 117 participants from both public and private sector hospitals of Peshawar. Census sampling technique was used to select the participants. Consent was obtained and data was recorded using the Rapid Upper Limb Assessment (RULA) questionnaire. Results: Among the participants (n=117), majority were from the age group 31-40 years, n=48 (41%) with a mean age of 36 ± 7. Regarding the gender distribution, males were greater in number, n=88 (75.2%). The ergonomic risk for musculoskeletal disorders reveals that, majority of the participants fall in the medium risk, followed by low risk, negligible risk and very high risk, respectively. The analysis showed statistically significant association of ergonomics risk with age, gender, working hours, organization and work experience. Conclusions: It was concluded that the ergonomic risk for musculoskeletal disorders among Ultrasonologists is moderate to low followed by high risk. Males have higher ergonomic risk compared to females. Further investigations are needed.
Influences of Different Sowing Dates on Growth and Yield of Linum usitatissimum L. at Sheringal, Dir Upper, Khyber Pakhtunkhwa, Pakistan Haq, Syed Manzoor ul
Asian Journal of Science, Technology, Engineering, and Art Vol 1 No 2 (2023): Asian Journal of Science, Technology, Engineering, and Art
Publisher : Darul Yasin Al Sys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/ajstea.v1i2.2059

Abstract

The present experiment was conducted to examine the influence of the seeds sowing date on parameters like height of plant, number of the fruiting branches per flax plant, number of capsules, quantity of seeds per flax plant, weight (g) of (1000) seed of the Linseed (Linum usitatissimum L.) at the Sheringal, Dir Upper, Khyber Pakhtunkhwa, Pakistan. Experiment was designed in randomized complete block, consisting of three partitions. The sowing times of the plots were kept (1st February, 15th February and 1st March). The characters studied were the number of branches bearing fruit per plant, number of capsules per flax plant, seed number per capsule, plant height, and 1000 seeds weight. The data revealed that, sowing time has an important impact on height of the plant, numbers of capsules per plant and on the quantity of seeds in each pod. Mean comparison indicated that sum of the main fruiting branches of plant, number of capsule per plant, seeds number per pod in flax, plant height (cm), and 1000 flaxseeds weight were at the highest level observed in second sowing date (15th February). It was also noted that sowing date executed a positive change on all traits. The results showed that the yield of 1st February, 15th February and 1st March for number of seeds/capsule were 6.07, 6.20 and 5.18; likewise the parameter of 1000 seeds weight 7.31 g, 8.26 g and 6.03 g. It was concluded that early sowing period had a positive effect on all the parameters studied.
Pengaruh Penambahan Aditif Diethanolamine (DEA) pada Ukuran Kristal Semikonduktor Copper Tin Oxide (CuSnO3) dengan Metode Sol-Gel Karlina, Lilis; Sanjaya, Hary
Asian Journal of Science, Technology, Engineering, and Art Vol 1 No 2 (2023): Asian Journal of Science, Technology, Engineering, and Art
Publisher : Darul Yasin Al Sys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/ajstea.v1i2.2064

Abstract

This research involves the synthesis of Copper Tin Oxide (CuSnO3) using the sol-gel method. The synthesized CuSnO3 was characterized by X-Ray Difraction (XRD) to obtain the crystal size using the Debye-Scherrer equation. The crystal sizes obtained by adding 0 mL DEA and 2 mL DEA were 21.05 nm and 47.9 nm. There was an increase in crystal size with increasing DEA additive volume.
Pengaruh Konsentrasi Perkursor terhadap Sifat Listrik dari Lapisan Tipis Rindiani, Maiyola; Sanjaya, Hary; Budiman, Septian
Asian Journal of Science, Technology, Engineering, and Art Vol 1 No 2 (2023): Asian Journal of Science, Technology, Engineering, and Art
Publisher : Darul Yasin Al Sys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/ajstea.v1i2.2068

Abstract

A thin layer is a layer made from organic or non-organic materials which are semiconductors, conductors and insulators. This research aims to determine the effect of precursor concentration on the electrical properties of thin films. Variations in precursor concentration used were 0.025 M, 0.05 M, and 0.075 M. CuSnO3 thin films were characterized by UV-DRS, XRD, FPP, and SEM. The method used in this research is sol-gel. The sol-gel process is used because of its ability to control the surface properties of oxide composites. The results of the band-gap test the variation in precursor concentration obtained by the band-gap value becomes smaller with increasing concentration. The lowest band-gap value in variations in adding an MEA volume of 2 ml, the optimum band-gap value is 2.1706 eV. The results of the FPP test on a thin layer of CuSnO3 precursor concentration of 0.05 M with an optimum MEA of 2 ml obtained a resistivity value of 0.0005671 Ωm with a conductivity value of 173.5809 Ω^(-1) m^(-1).
Pengaruh Variasi Ukuran Ketebalan Material terhadap Karakteristik Termoelektrik Komposit CuO/Karbon Aktif Kulit Pisang Kepok Aisyi, Rihadatul; Putra, Ananda
Asian Journal of Science, Technology, Engineering, and Art Vol 1 No 2 (2023): Asian Journal of Science, Technology, Engineering, and Art
Publisher : Darul Yasin Al Sys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/ajstea.v1i2.2069

Abstract

Thermoelectric is a device that can convert heat energy into electrical energy. One thing that influences the quality and characteristics of a thermoelectric material is the size of the thermoelectric material. In this research, we will look at the effect of the size of the thermoelectric material which has been varied in thickness. The thermoelectric material itself is made from a composite of active carbon from kepok banana peel with CuO with a mass ratio of 3:7. The composite was then printed with varying mold thickness sizes and the results were that a mold with a thickness of 0.5 cm was the best mold with an electrical conductivity value of 0.2 MS/cm, a heat conductivity value of 0.0680394 J/s, a value the Seebeck coefficient is 1.13229 mV/oK. The band gap value of the activated carbon and CuO composite resulting from the DR-UV test is 1.27 eV

Page 3 of 23 | Total Record : 226

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