Search

The interaction between a traveling shock wave and a cylindrical water column was predicted using the open-source CFD toolbox OpenFOAM. The two-dimensional flow in a shock tube device was simulated by using the volume-of-fluid method for tracking the transient interface between the two immiscible fluids. The analysis was based on the Reynolds-averaged Navier-Stokes approach, where an eddy-viscosity model was supplied for the turbulence closure. The acceptably accurate results achieved for this complex fluids engineering problem confirmed the viability of this toolbox for industrial research and development. [ABSTRACT FROM AUTHOR]

Technological developments in the industrial sector are overgrowing from time to time—especially the machining part and the demands of consumers who want workpieces of good quality and efficiency. Product quality is an absolute thing that must be considered in the machining process, especially in the cooling machine. The capillary tube in the Air Conditioner engine expansion device is essential because it connects two different pressure sections, high pressure, and low pressure. Although in this study, the method used is the experimental method, the practical approach serves to determine how effective the variation of the length of the capillary tube is on the performance of the 1 PK split AC cooling machine with capillary pipe lengths of 70 cm, 60 cm, and 50 cm, diameter of 3.4 mm, parameters determine performance. AC by determining its COP value. The results of the research conducted for 60 minutes showed that the variation of the capillary tube length on the version of the LG branded Split 1 PK AC led to the highest COP results in modifying the 70 cm capillary tube length of 6.8557 kJ/kg. [ABSTRACT FROM AUTHOR]

The security challenges are more in the area of Cloud computing platform. The On-demand service of Cloud Computing secures a vital role in the industrial development and other IT sectors. This paper will try to provide the information based on the current threats and attacks on Cloud Computing and the solution to those attacks. Cloud Computing provides various set of service models like Platform-as-a-Service (PaaS), Software-as-a-Service (SaaS) and Infrastructure-as-a-Service (IaaS) respectively. The cloud security measures are still a challenging task for organizations and other IT Sectors to handle the external attacks. Concluding that this survey will leads to give an overview of threats, attacks and vulnerabilities in the era of Cloud platform as well as some of the countermeasures to protect the cloud. [ABSTRACT FROM AUTHOR]

The paper presents the results of studies to determine the optimal conditions for the hydrochlorination reaction of piperylene with concentrated hydrochloric acid. The experiment procedure is described, graphs of piperylene conversion versus reaction time and molar ratio of C5H8:HCl are given. As a result of the studies carried out, optimal conditions for the process were established, as well as technological methods were identified that made it possible to achieve almost complete conversion of piperylene, while minimizing the amount of waste generated. Based on experimental data, a flowchart of the production of 4-chloro-2-pentene was compiled. The proposed flowchart and the results of studies to determine the optimal process parameters can be used as a basis for the development of industrial technology to produce 4-chloro-2-pentene. [ABSTRACT FROM AUTHOR]

To address the need for an affordable but high-performance nondestructive testing system for manufacturing industry, PRTDRAN (the Research Center for Radiation Detection and Nuclear Analysis Technology) is developing an X-ray based CT scan system. The CT system under development consists of an X-ray generator, a radioscopy box, and a turntable for the sample. It was built for USD 33,100. The thickest material the CT system can examine is 8 mm for steel and 8 cm for aluminium. The radioscopy box used is based on the principles followed in IAEA Radiation Technology Reports No. 2, but with significant modifications. The camera resolution is 20 megapixels, while an image detector of up to 30 cm × 30 cm size can be accommodated. The position of the camera is adjustable, allowing for the precision needed for use in a CT scanner. The radioscopy box weighs just 30 kg. The CT scanner is housed in a 220 cm × 140 cm × 180 cm housing made of a lead and stainless steel plates. The operation of the system is controlled from a computer in a separate control room, to further improve user safety. Through testing, the system has been found to perform CT imaging and reconstruction well, with pre-reconstruction interpolated basic spatial resolution iSRb of 0.234 mm, while the radiation exposure outside the system did not exceed 0.6 µSv/h at 1 m from the housing. It is expected that the nondestructive examination capability provided by the system will be affordable even for smaller companies. [ABSTRACT FROM AUTHOR]

The development of the industrial world continues to experience significant progress, one of the growing industries is the halal food industry. Developing halal food requires the support of Halal Supply Chain Management (HSCM). The implementation of HSCM activities has several risks that can hamper the halal supply chain process directly or indirectly which can harm the company. Some of the risks that can occur in the food industry are the unclear status of the halal raw materials that have been ordered and the raw materials received are contaminated with najis. In order to be able to mitigate and overcome the various risks that arise in the Halal supply chain, efforts should be made to improve the performance of the supply chain by overcoming and preventing various risks. This research aims to measure and improve supply chain performance using the SCOR model. In addition, the House of Risk method is utilized to identify risks the house-of-risk method is used to identify risks that arise in the supply chain process so that appropriate strategies can be developed to manage these risks. There were twelve risk events and seven risk agents identified, which were then incorporated into the development of risk mitigation strategies. There were four preventive actions that may be taken as mitigation strategies. The other result in this research is a monitoring system in order to facilitate risk monitoring. [ABSTRACT FROM AUTHOR]

The implementation of the tender raises different chances of failure for several participating companies. If a company participates in a tender, there will be risks that it can fail to win the bid. The best bidder is greatly influenced by how the bidding process is handled. In the process of bidding activities carried out by the contractor is to make an estimation of the cost of carrying out the work by taking into account the cost of all the necessary resources such as labor, materials, equipment, and finance along with the cost of the work being subcontracted, overhead and profits. Technological developments in the industrial era 4.0 has risen to a new method for the accuracy of the cost estimation process at the tender stage, namely BIM 5D. The application of BIM 5D in construction projects is believed to provide benefits to the cost performance of construction projects. However, every technology and method used has risks that may occur. The purpose of this paper is to identify what risks occur when using BIM 5D. This study uses survey methods, literature studies, and case studies, and then data analysis uses the Delphi method. The results of the study show that there are 8 highest risks in using BIM 5D; Scope of work is not available in a complete and clear manner, Incomplete project information, Error in making work breakdown structure, There is no standardized BIM Deliverable, Lack of collaborative work processes and modeling standards, The use of BIM-based software that is not integrated with each other, Lack of compatibility of the software used, and Inaccuracy in inputting sizes and specifications from 2D images to 5D BIM-based software. If considering the results of these risks, it is hoped that the use of BIM 5D can improve the accuracy of cost estimation calculations at the project tender stage. [ABSTRACT FROM AUTHOR]

The article is devoted to the description of the practical aspects of building systems for collecting, processing and storing data coming from technological equipment. The structural model is considered, it is described what basic modules the model consists of. The problem of storing data coming from technological equipment is considered. An experimental stand was developed, test tests were carried out for collecting and storing data, confirming the correctness of the developed model and data storage methods. [ABSTRACT FROM AUTHOR]