JournalTOCs

Journal of Mechanical, Civil and Industrial Engineering
Number of Followers: 11

This is an Open Access Journal

Open Access journal
ISSN (Online) 2710-1436
Published by Al-Kindi Center for Research and Development

[14 journals]

Understanding Chemical and Mineralogical Composition of Nahartangi
Nephrite from Goshta
- Authors: Usman Amin, Hamid Zaheer Zaheer, Ahmad Faham Bawary, Safiullah Noorzai, Ulfatullah Noori, Sohaib Nader
  Pages: 01 - 07
  Abstract: The geochemical mineralogical characteristics of the Nahartangi nephrite deposit in the Goshta district of Nangarhar province are investigated in this research. Nephrite is a Cyclosilicate mineral with a high silicate content. Ca2(Mg, Fe)5Si8O22(OH)2 is its chemical formula, and it is monoclinic. It's been discovered in metamorphic rocks across the arena. The nephrite zone of Nahartangi is linked to the Jalalabad structural band and the ophiolite complex. Jalalabad is a region in eastern Afghanistan, southeast of Nuristan. As a result, this belt is associated with the upper or late Cambrian. The age of the rocks in this quarter is related to the Archean-Mesoproterozoic AR-PR2. This manuscript offers the first systematic mineralogical and geochemical observation of the Nahartangi nephrite deposit electronic probe Microanalysis, X-ray fluorescence spectroscopy (XRF) and mineralogical analysis. The Nahartangi nephrite was investigated using an XRF and petrographic microscope. According to field research, dolomitic marble is involved in Nahartangi nephrite deposits close to the intrusive granitoids. According to petrographic investigations, nephrite is mostly made up of fine-grained actinolite, schist, and dolomite, all of which are metamorphic minerals. Through every phase, nephrite samples had low Fe/(FeO+MgO) values (8.2524.17%) according to geochemical analysis, and SiO2 (81.30%), Al2O3 (3.22), and CaO (17.41%) were also low and 1.21% NiO content, as well. Chemical records analysis and interpretation of Mg+Fe percentages indicate that actinolite is the type of nephrite. The formation of veins and hydrothermal lenses in contact with serpentinite and carbonates has produced nephrite deposits. Dolomitic marble rocks are the specific rocks found near the study area. The economy and value are immediately impacted by color and its transparency. The presence of Mg elements causes the nephrite from the Goshta district to appear green.
  PubDate: 2023-10-17
  DOI: 10.32996/jmcie.2023.4.4.1
  Issue No: Vol. 4, No. 4 (2023)
Impact Analysis of Public Electric Vehicle Charging Stations on
Transformers and Distribution Networks
- Authors: Syafruddin HS, Ali Hanafia Rambe , Agus Prabowo
  Pages: 08 - 19
  Abstract: Public Electric Vehicle Charging Stations (SPKLUs) are critical infrastructure in facilitating the increasingly popular use of electric vehicles. The increasing number of electric vehicles using SPKLU also has an impact on existing transformers and distribution networks. This research uses the Fluke 1748 tool to analyze the impact on transformers and distribution networks. The Fluke 1748 is a tool that can record and analyze electrical parameters such as voltage, current, power, and power factor with high precision. The method used in this analysis involves installing the Fluke 1748 device at strategic points around the SPKLU, transformer, and distribution network. The results of this study are At the public electric vehicle charging station, an analysis has been carried out on the voltage and current where the results of THDV of 2.212% still meet the IEEE 2014 standard and THDi of 4.929% meet the IEEE 2014 standard, the impact caused is that there are losses in kWh sales due to voltage drops or voltage drops of 2250 watts, losses in significant transformers and in the conductor also cause a voltage drop of 2.5% of the nominal voltage.
  PubDate: 2023-10-25
  DOI: 10.32996/jmcie.2023.4.4.2
  Issue No: Vol. 4, No. 4 (2023)
Investigating the Factors that Increase Traffic Accidents and Choosing
Appropriate Solutions for Afghanistan's Roads
- Authors: Sayed Naqibullah Hashimi, Naqibullah Safi, Muhammad Rafi Nazari
  Pages: 20 - 29
  Abstract: Generally, traffic problems and issues are divided into two functional and safety categories. Functional problems appear in the form of long delays in one or more directions of movement and safety problems, usually in the form of multiple interferences, incorrect maneuvers, non-compliance with traffic control devices, and, ultimately, accidents. Obtaining sufficient and reliable information for making decisions and implementing effective interventions in the field of reducing traffic accidents is of particular importance. This study was conducted with the aim of investigating the factors that increase accidents and providing correct solutions. In order to obtain the basic factors of the increase in accidents and to introduce suitable solutions, a questionnaire with the content of the factors of the increase in accidents and reduction of road accidents in Afghanistan was prepared and arranged and given to the people (drivers, passengers, pedestrians, managers). traffic, traffic police, and civil servants) was distributed at different levels (Bac Loria, bachelor, master, and doctorate). After collecting and analyzing the questionnaires, the field data was analyzed by the SPSS program, and according to the output of the program, among the 21 questions of the questionnaire, the questions that need to be answered have received more attention. In this study, excessive use of depreciated cars, non-existence of stops, non-observance of traffic rules (driving), and non-standard transport routes are increasing factors, as installation of traffic signboards in prominent places, the separation of roads based on the nature of light and heavy vehicles, the correct use of public roads, compliance with the speed limit and not overtaking the zigzags of cars. Legal dealings with violators were known to be the factors that reduce accidents, and Eliminating the increasing factors and considering the decreasing factors of this research is offered to the competent authorities.
  PubDate: 2023-10-27
  DOI: 10.32996/jmcie.2023.4.4.3
  Issue No: Vol. 4, No. 4 (2023)
Development of a DC Motor Speed Control System Based on PID
- Authors: Qianyao Xu Qianyao Xu
  Pages: 30 - 39
  Abstract: In the field of motion control systems, motor speed control plays a pivotal role. Various control algorithms and methods have been developed for this purpose, and one of the earliest strategies to emerge was analog control. Over time, it has evolved into a typical control structure with convenient parameter tuning capable of meeting general control requirements. This design is based on digital control algorithms, with the ST89C52 microcontroller as the control core. It generates pulse-width modulation (PWM) pulses controlled by a digital algorithm to regulate the speed of direct circuit (DC) motors. Additionally, it utilizes a photoelectric sensor to convert motor speed into pulse frequency, which is fed back to the microcontroller, thereby achieving closed-loop speed control and eliminating static speed errors.
  PubDate: 2023-11-03
  DOI: 10.32996/jmcie.2023.4.4.4
  Issue No: Vol. 4, No. 4 (2023)