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All Journal Journal of Community Service and Empowerment Indonesian Journal of Chemical Studies (Indones. J. Chem. Stud.) International Journal of Applied Mathematics, Sciences, and Technology for National Defense
Nurrosyid, Naufan
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Biochemistry, Genetics & Molecular Biology Chemistry Computer Science & IT Mathematics Physics Social Sciences Other

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Iron determination in multivitamin tablets: Enhancing military nutritional preparedness based linear regression method Prasojo, Agus Eko; Anitasari, Reza; Sijabat, Windy Nelasari; Nurrosyid, Naufan
International Journal of Applied Mathematics, Sciences, and Technology for National Defense Vol 1, No 2 (2023): International Journal of Applied Mathematics, Sciences, and Technology for Natio
Publisher : FoundAE

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58524/app.sci.def.v1i2.165

Abstract

AAS is also an important method that has the most extensive application in metal analysis. most of the determinations were carried out by thin spectrophotometry, therefore an experiment was carried out to determine the Fe content in multivitamin tablets using the atomic absorption spectrophotometry method has high selectivity and sensitivity. Standard solution preparation. Prepare a standard solution of Fe with a concentration of 1, 2, 3, 4, and 5 ppm, then read the absorbance of the standard solution on AAS. Sample solution preparation and absorbance measurement. Several tablets were put into a beaker and 7 ml of concentrated HCl was added working principle of atomic absorption spectrophotometry is based on the evaporation of the sample solution which will initially be nebulized to form a spray, then it will be desolvated to form a dry aerosol until it is evaporated and converted into free atoms.. Iron levels in samples using AAS can be found by measuring the intensity of the radiation that decreases after being transmitted. The reduction in radiation intensity is proportional to the concentration of the sample element in the sample being measured. By testing the t-test, it was found that the AAS instrument was more sensitive to low concentrations
Novel Absorber Material Design Based on Thiazole Derivatives Using DFT/TD-DFT Calculation Methods for High-Performance Dye Sensitized Solar Cell Nurrosyid, Naufan; Fahri, Mirad; Apriliyanto, Yusuf Bramastya; Basuki, Rahmat
Indonesian Journal of Chemical Studies Vol. 1 No. 1 (2022): Indones. J. Chem. Stud., June 2022
Publisher : Indonesian Scholar Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (362.122 KB) | DOI: 10.55749/ijcs.v1i1.5

Abstract

Thiazole derivative molecules with a low energy gap have been successfully designed using the DFT/TD-DFT calculation methods. The calculations were simulated by adding varied numbers of thiophenes (1, 2, 3, and 10) and electron donating molecules of –H, -NH2, -OCH3, and –COOH in the ethanol solvent. The best thiazole derivative was the molecule constructed using a long-conjugated bridge of 10-thiophenes, the carboxyl anchoring site, and an amine addition as the electron donating molecule with an energy gap of 1.66 eV and a strong UV-Vis absorption in the red light region (673.20 nm). These designed molecules are beneficial to be applied in the equator area such as Indonesia. Further, the profound effects of the thiophene bridge in terms of the structural and energy gaps, and the variation of electron-donating molecules affected the photonic properties have been demonstrated in this paper.
A Critical Technology Implementation of Sodium Solid-state Battery as the Secure Long-Duration Energy Storage toward the Terra-Watt Grid Projects Kurniadi, Tedi; Fahri, Mirad; Aurellia, Fidela; Nurrosyid, Naufan
Indonesian Journal of Chemical Studies Vol. 1 No. 2 (2022): Indones. J. Chem. Stud., December 2022
Publisher : Indonesian Scholar Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (892.167 KB) | DOI: 10.55749/ijcs.v1i2.17

Abstract

The current lithium-ion battery (LIB) has become a vital technology for realizing a highly-productive society. The current system can be found easily in every personal electronic device, such as smartphones, laptops, smartwatches, and digital cameras. However, the future of LIBs is questionable due to the scarcity and security issues. The common electrolytes in this system are highly flammable, toxic, and easy to leak. Thus, inherit them to be applied for more mass-reliable energy sources, the terra-watt projects. Therefore, the development of an all-solid-state battery based on earth-abundant and cost-effective processing should be carried out immediately to dominate the market and for future civilization. Herein, we promoted a Sodium solid-state battery (SSB) that potentially be a key in energy storage technology due to its mechanical properties, electrochemical stability, high ion conductivity, and robust cyclic performance. Furthermore, a five-year direct implementation strategy of SSB was also presented, constructed from sodium and chromium electrodes.
Comparative Analysis of Electronic Structures Calculations: A Simple Test Case Set for Kohn-Sham Density Functional Theory and Hartree-Fock Methods Apriliyanto, Yusuf Bramastya; Nurrosyid, Naufan
Indonesian Journal of Chemical Studies Vol. 2 No. 2 (2023): Indones. J. Chem. Stud., December 2023
Publisher : Indonesian Scholar Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55749/ijcs.v2i2.33

Abstract

A comparative analysis on the performance of Kohn-Sham density functional theory (KS-DFT) and Hartree-Fock (HF) methods to obtain reliable energy and electronic properties has been performed in this study using a simple test case. It is crucial to re-emphasize the key differences between these methods to address common conceptual difficulties that occur among freshmen studying basic computational chemistry. The results suggested that the eigenvalue theorem in determining ionization potential could be well implemented in the HF but not in the KS-DFT method. The total energy difference between ionized and non-ionized species was an appropriate procedure to calculate the first ionization potential within the KS-DFT method. The HOMO-LUMO gap in the HF was larger than the gaps obtained from the KS-DFT method. Among all of the performed calculation methods, the B3LYP hybrid functional provided better total energy where the eigenvalues were located between the HF and the LDA/GGA functionals.
Enriching of society’s understanding of command-oriented leadership through an interactive virtual discussion Fahri, Mirad; Stiawan, Elva; Ariyanti, Dita; Basuki, Rahmat; Apriliyanto, Yusuf Bramastya; Hasibuan, Anggi Khairina Hanum; Kurniadi, Tedi; Putra, M. Sulthon Nurharmansyah; Septaningsih, Dewi; Tiarani, Sekar Ilma; Mayori, Ersha; Wiana, Regita Andriani; Yunita, Amalia; Nurrosyid, Naufan; Prasojo, Agus Eko; Putri, Riyanti
Journal of Community Service and Empowerment Vol. 5 No. 2 (2024): August
Publisher : Universitas Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/jcse.v5i2.27961

Abstract

In the post-pandemic era, many interactive activities have been flexibly generated through virtual conditions. Accordingly, some problems could appear in terms of leadership, such as difficulties in maintaining the audience’s attention during the event. Thus, the utilization of a command-based leadership style that could straightforwardly maintain audience focus ought to be considered to be adopted. However, both the command-based leadership style and its prospective aspects have not been widely understood by society. This community service aims to deliver a proper understanding of the command-based leadership style through interactive virtual discussion between experts in teaching activities of defense-based science and society consisting of Indonesian teachers, high school students as well as academics. Statistical results of pre-test and post-test scores showed enhancement of the participants’ understanding of command-based leadership. Hopefully, some relevant aspects of their new perspective of command-based leadership can be properly adopted and effectively implemented to answer current challenges, such as in terms of managing people in virtual conditions. 
Co-Authors ANGGI KHAIRINA HANUM HASIBUAN Anitasari, Reza ARIYANTI, DITA Aurellia, Fidela Elva Stiawan Fahri, Mirad Kurniadi, Tedi Mayori, Ersha Prasojo, Agus Eko Putra, M. Sulthon Nurharmansyah Putri, Riyanti Rahmat Basuki Septaningsih, Dewi Sijabat, Windy Nelasari Tiarani, Sekar Ilma Wiana, Regita Andriani Yunita, Amalia Yusuf Bramastya Apriliyanto