COMPUTER SIMULATION OF POWER SUPPLY FOR LIGHT EMITTING DIODES WITH TWO CURRENT’S SOURCES

The article provides results of engineering design of switching power supply for light-emitting diodes with application current’s sources. Propose a schematic design on base PWM-controller with two transistor keys. Represented results of computer imitation design of power supply at CAD TINA-TI on base of engineering design spice macros IC of PWM-controller.

E-commerce Web App in Azure Cloud: Considerations, Components of Implementation and Schematic Design

Consumers shifted their spending to the web due to the coronavirus (Covid-19) outbreak. Businesses and organizations that once mapped digital strategy with careful planning over a transition period, now forced to scale their initiatives in a matter of days. In this regard, we are motivated by the need to develop a scalable, highly available, resilient, secure, and cost-effective e-commerce web application for demonstrating how cloud services can be leveraged for implementing such applications. This paper is a part of the aforementioned web application development project, titled “A cloud-based e-commerce storefront prototype for SMEs in Oman”. In this paper, we discuss the system considerations, components of implementation, and the schematic design of the proposed software solution. This paper provides meaningful guidelines for companies that want to adopt cloud-based E-commerce web application to bring their products and services online without much upfront cost or initial investment.

CEPC Z-pole polarization design studies

In this paper, we give preliminary designs of beam polarization manipulations by inserting three different types of insertions in the Circular Electron–Positron Collider (CEPC) at center-of-mass energies of 91 GeV (Z-pole). With the wigglers in the collider ring, we can obtain 5% transverse polarization in 1.1 h for the precise energy measurement. To overcome depolarization effects as the beam energy rises from 10 GeV to 45.5 GeV in the booster ring, Siberian snakes based on helical magnets are adopted. Finally, for longitudinally polarized beam collisions, a schematic design of spin rotators based on solenoids in the collider ring is studied.

COMPUTER AIDED SCHEMATIC DESIGN: HOW TO MANAGE LARGE DATA IN THE EARLY STAGES OF URBAN DESIGN PROJECTS

The study was designed to research and analyse the existing methods used in the industry and propose alternative solutions that would meet the growing project demand. One of the major findings of this paper shows that 65% of interviewed architects and urban designers reported a lack of data accuracy in their concept design solutions, as well as dissatisfaction with the segregated concept design process. Having identified key inefficiencies in pre-design and the schematic design stages of urban design, the study develops a multiplatform web application - a space planning tool that is capable of assisting with data informed design decisions in the early stages of large-scale urban design projects. The alternative solution allows for the execution of concept stage prototyping through UI cell modification by integrating data and generating spatial solutions based on the adjacency requirements. Purpose: the purpose of this study is to understand, improve and eliminate inefficiencies in the early stages of the urban design process. Methodology: this study will first review existing inefficiencies of the architecture and urban design industry using 2 researched methods: non-participant observations and surveys. Non-participant observations were continuous and were carried out for a period of 9 months. The group that was studied involved 17 people that worked on the early-stage design stage of large-scale architecture and urban design projects. In addition to that, a survey was carried out to examine the identified inefficiencies further and to confirm the hypothesis. The survey involved 370 industry professionals from over 15 countries. Based on the developed understanding of project delivery inefficiencies, a classification will be developed to categorize the existing software. Finally, this study will conduct a series of experiments to develop a technical solution to meet current industry demands. Results: identification of key pre-design and the schematic design inefficiencies, development of a multiplatform web application. Practical implications: the application is being tested and used in the industry of architecture, urban and spatial design, it has the potential to save companies time and financial resources.

Low Power and Fast Full Adder by Exploring New XOR and XNOR Gates

In this project, novel circuits for FULL ADDER are proposed using new XOR or XNOR gates. The conventional design of XOR or XNOR gates shows that the not gate in the schematic has drawbacks. So by investigating advanced XOR or XNOR gates we proposed the schematic design. The proposed schematics are optimized in terms of speed, delay, power and power delay product. We developed six novel hybrid full adder schematics based on exploring new XOR or XNOR gates. Each designed schematics have their specifications of energy consumption, delay, power delay product. To simulate the performance of the proposed designs, we use mentor graphics, tanner tool. The simulation yields a 45-nm CMOS innovation model that focuses on the proposed plans having best speed and power other than the plan of any full adder. The proposed Full Adders has 2-28% increment in consumption of energy and power delay product compared to other design schematics. The proposed hybrid full adders are investigated with voltage 1.8V, speed ,size of transistors, area, power consumption and delay.

Proposition of Design Capacity of Borehole Heat Exchangers for Use in the Schematic-Design Stage

This study proposes a simple ground heat exchanger design capacity that is applicable in the schematic-design stage for several configurations used for borehole heat exchangers (BHEs). Three configurations—single, compact, and irregular types—were selected, and the heat transfer rate per unit BHE was calculated considering heat interference. In a case study with a typical configuration and general range of ground thermal conductivity, the BHE heat transfer rate of the compact configuration decreased owing to heat interference as the number of BHEs increased. However, with respect to the irregular configuration, the heat transfer rate increased as the same number increased. This was attributed to the relatively large increment rate of the distance between the boreholes in the irregular configurations, making the heat recovery factor more dominant than the heat interference. The results show that the average heat transfer rate values per BHE applicable to each configuration type in the schematic-design stage were 12.1 kW for the single configuration, 5.8 kW for the compact type, and 10.3 kW for the irregular configuration. However, owing to the large range of results for each case study, the error needs to be reduced by maximally utilizing the information available at the schematic-design stage.

Management-developing of an algorithm for the design decisions in the innovative activity of an organization

This article proposes a new algorithm for developing conceptual project decisions in terms of an organization or innovator’s response to changing consumer demands through the development and investment in innovations. The theoretical basis for choosing the type of an algorithm was elaborated by studying the available referencies relevant to present issues of the applicability of types of algorithms for developing management decisions. A multistage multicriteria algorithm (hereinafter referred to as MMA) was developed on the basis of studied algorithms. On developing the stages of the MMA, a set of thinking methods (analysis – synthesis, deduction – induction), a decomposition method, and logical methods were used. MMA is considered as a set of step-by-step sequential descriptions of local processes, formulations and solutions of management tasks, used decision methods and decision-making criteria. The SMART(ER) method was used for managerial tasks at each stage to be set. When solving a management problem, a set of methods was used including an expert method, a factor analysis, brainstorm and methods for calculating economic efficiency. For choosing solutions at each stage to be made, a set of criteria was used. They are the weight of the negative impact on the result of the activity, the yes/no method, the maximum effect, costs minimizing, risks. The schematic design was defined for MMA to be developed. The schematic design was considered as a method of modeling and a method of graphical-analytical displaying of the stages of the process.