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All Journal Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi Cyber Security dan Forensik Digital (CSFD)
Murni Murni
Universitas Diponegoro
Aerospace Engineering Automotive Engineering Computer Science & IT Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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CYBER SECURITY BEHAVIOR MODEL ON HEALTH INFORMATION SYSTEM USERS DURING COVID-19 PANDEMIC Penggalih Mahardika Herlambang; Sylvia Anjani; Hendro Wijayanto; Murni Murni
Cyber Security dan Forensik Digital Vol. 3 No. 2 (2020): Edisi November 2020
Publisher : Fakultas Sains dan Teknologi UIN Sunan Kalijaga Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14421/csecurity.2020.3.2.2152

Abstract

The use of the Health Information System raises the risk of data leakage which is mostly caused by internal health facilities. For this reason, an instrument is needed that can measure the behavior of users who are at risk for the health information system used to minimize the potential for these leaks. Develop and test the validity and reliability of the questionnaire based Human Aspect of Information Security Questionaire (HAIS-Q), Risky Security Behavior Scale (RScB), and the tendency of Internet users in Indonesia. Based on the research 4 aspects that affect the security of Health Information System, namely the use of electronic devices, access to healthinformation systems, internet behavior, and unusual events in health facilities. The questionnaire developed consisted of 27 question items was valid (r count> r table) and reliable (Alfa Chronbach value of 0.777). The developed questionnaire design can be applied to assess the risk of cyber attacks on Health Information Systemsin health facilities. Further research is needed to implement the design of the questionnaire.
REDESIGN PULVERIZER SHAFT UNIT 2 DI PLTU SEKTOR BUKIT ASAM 4 X 65 MW Arief Prakoso Hardyanto; Wiji Mangestiyono; Seno Darmanto; Murni Murni
Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi Vol 8, No 2 (2022): Oktober
Publisher : universitas teuku umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (26.898 KB) | DOI: 10.35308/jmkn.v8i2.6412

Abstract

In the operation of the Bukit Asam power plant, in all generating units there are many disturbances that can cause derating the units. Derating of the unit can occur due to decrease in the performance of the steam turbine, decrease in the reliability of the pulverizer, and also disturbances in the coal supply system and various factors. Based on the performance data of the Bukit Asam Generation Sector (Monthly disturbance report) in January 2014, there were 54 derating disturbances recorded. One of the causes of the derating was a broken Pulverizer Shaft with a loss of operating hours for 196.78 [hours] which caused an unallocated electricity loss of 12,422 [GWh]. With the realization of AFI (Action For Improvement) in this final project creation assignment, it aims to redesign the shaft pulverizer, as well as analyze the causes of the pulverizer shaft break. By redesigning the pulverizer shaft and analyzing the cause of the pulverizer shaft breaking, it was found that the cause of the fracture of the shaft made from AISI 1045 with the old design was from calculating the shear stress value of 48.44 x 107 [N/m2], this result exceeded the value of the material permit voltage of 31.8 x 107 [N/m2], so it was not safe to use and the service life was not long. The results of the redesign shaft changed the dimensions of the diameter of the shaft head which was previously 0.174 [m] in diameter to a dwelling of 0.25 [m]. The results of calculating the redesign shaft made from AISI 1045 obtained a shear stress value of 16.33 x 107 [N/m2], this result is smaller than the material clearance voltage value of 31.8 x 107 [N/m2], so it is safer with a relatively longer service life.Keywords: Derating, Pulverizer Shaft, material, Redesign, Shear Stress
Co-Authors Arief Prakoso Hardyanto Hendro Wijayanto Penggalih Mahardika Herlambang Seno Darmanto Sylvia Anjani Wiji Mangestiyono