Modeling Bitcoin plus Ethereum as an Open System of Systems of Public Blockchains to Improve Their Resilience against Intentional Risk

In this article, we model the two most market-capitalised public, open and permissionless blockchain implementations, Bitcoin (BTC) and Ethereum (ETH), as a System of Systems (SoS) of public blockchains. We study the concepts of blockchain, BTC, ETH, complex networks, SoS Engineering and intentional risk. We analyse BTC and ETH from an open SoS perspective through the main properties that seminal System of Systems Engineering (SoSE) references propose. This article demonstrates that these public blockchain implementations create networks that grow in complexity and connect with each other. We propose a methodology based on a complexity management lever such as SoSE to better understand public blockchains such as BTC and ETH and manage their evolution. Our ultimate objective is to improve the resilience of public blockchains against intentional risk: a key requirement for their mass adoption. We conclude with specific measures, based on this novel systems engineering approach, to effectively improve the resilience against intentional risk of the open SoS of public blockchains, composed of a non-inflationary money system, “sound money”, such as BTC, and of a world financial computer system, “a financial conduit”, such as ETH. The goal of this paper is to formulate a SoS that transfers digital value and aspires to position itself as a distributed alternative to the fiat currency-based financial system.

Service room design for improving service quality of Utsman bin Affan library Universitas Muslim Indonesia with Kansei Engineering approach

A student can study well if there is a good place to study as well. Likewise with reading, a person needs concentration to read. Service room design is necessitated in the reading room because it affects one’s reading comfort. Utsman bin Affan library UMI Makassar is a place for students to study. Students’ complaints and problems that are experienced when using the library service room are in the form of uncomfortable facilities, no closed rooms, and other complaints. In reference to these problems, a study was carried out in accordance with the students’ complaints by employing Kansei Engineering approach. Kansei Engineering is a consumer-oriented ergonomic technology which enables the consumer’s image or feeling to unite with the service design process of a product. By utilizing this method, product strategy and concept creation in the design of a product or service can be determined. The final results of Utsman bin Affan UMI Makassar library service room which was obtained based on the Kansei Engineering method are an open service room, large display, reading room, multimedia room, collection room, green and white colors, 3D motif and glossy texture. In addition to the main specifications of the library, there is also an additional item supporting the service room, which is a partition made of glass that gives the impression of being open to the room although it is still divided into different spaces.

Development of a Procedure for the Determination of the Buckling Resistance of Steel Spherical Shells According to EC 1993-1-6

This paper presents the process of developing a new procedure for estimating the buckling capacity of spherical shells. This procedure is based entirely on the assumptions included in the standard mentioned, EN-1993-1-6 and also becomes a complement of EDR5th by unifying provisions included in them. This procedure is characterized by clarity and its algorithm is characterized by a low degree of complexity. While developing the procedure, no attempt was made to change the main postulates accompanying the dimensions of the spherical shells. The result is a simple engineering approach to the difficult problem of determining the buckling capacity of a spherical shell. In spite of the simple calculation algorithm for estimating the buckling capacity of spherical shells, the results obtained reflect extremely accurately the behavior of real spherical shells, regardless of their geometry and the material used to manufacture them.

THE DEVELOPMENT OF METROLOGY INFORMATION SYSTEM

Metrology services are carried out in order to protect the consumers and producers in terms of obtaining fair rights in trade transactions. The Metrology Center as the implementor of metrology still faces obstacles in the implementation of its services, currently the service has only reached 24.7% of the total metrology equipment used. Obstacles that occur in addition to the problem of inadequate facilities and infrastructure are also because the process of capturing metrological data is still done manually using many paper documents. In each service element, there are various kinds of documents that must be filled out manually and in the end these documents will be archived separately. This flow of data and information has not been well documented, although the output data from this process will be processed into metrology information that will be used by management above it in making decisions. Metrology Information System was developed to overcome the obstacles that exist in The Metrology Center, in addition to supporting the performance of The Metrology Center as well for the success of E-Government. The development of a metrological information system uses the System Development Life Cycle (SDLC) method with a Business Process re-engineering approach for metrology services.

Contact Engineering Approach to Improve the Linearity of Multilevel Memristive Devices

Physical mechanisms underlying the multilevel resistive tuning over seven orders of magnitude in structures based on TiO2/Al2O3 bilayers, sandwiched between platinum electrodes, are responsible for the nonlinear dependence of the conductivity of intermediate resistance states on the writing voltage. To improve the linearity of the electric-field resistance tuning, we apply a contact engineering approach. For this purpose, platinum top electrodes were replaced with aluminum and copper ones to induce the oxygen-related electrochemical reactions at the interface with the Al2O3 switching layer of the structures. Based on experimental results, it was found that electrode material substitution provokes modification of the physical mechanism behind the resistive switching in TiO2/Al2O3 bilayers. In the case of aluminum electrodes, a memory window has been narrowed down to three orders of magnitude, while the linearity of resistance tuning was improved. For copper electrodes, a combination of effects related to metal ion diffusion with oxygen vacancies driven resistive switching was responsible for a rapid relaxation of intermediate resistance states in TiO2/Al2O3 bilayers.