Papers by Keyword: Flexibility

Abstract: Online shopping has become the right choice to avoid crowds and maximize social distancing during the Covid-19 pandemic. The restrictions on activities and staying at home during the pandemic have shifted consumer behavior towards digitalization, relying on e-commerce and social media for shopping. The shopping trend in the Jabodetabek area has shifted from offline shopping in malls to online shopping through various e-commerce applications. This research aims to determine the influence of Price (X1), Promotion (X2), Ease of Use (X3), and Flexibility (X4) on the Shopping Behavior of the Jabodetabek community (Y), which has now shifted from offline stores to e-commerce. This research uses linear regression with hypothesis testing using t-test, F-test, and coefficient of determination. The results of the study indicate a significant influence of X2 on Y, X3 on Y, and X4 on Y, while there is no significant influence of X1 on Y. However, there is a significant simultaneous influence of variables X1, X2, X3, and X4 on variable Y with a determination coefficient level of 78%.

Abstract: In the article, it is proposed to build the electricity consumption system in the distribution network of “Azerishiq” LTD with innovative solutions. Compensation of reactive power, which causes losses of electrical energy, has been calculated and thus the power factor has been improved. The organization of automatic control of this system helps to reduce and save electricity losses, as well as leads to increasing the efficiency of the accounting system and increasing the flexibility of intelligent networks.

Abstract: The study object is compressed reinforced concrete elements of different flexibility with indirect spiral reinforcement, and the study subject is their strength. A deformation method has been proposed to calculate the strength of these elements. The method is based on new dependencies for determining stresses and strains in a concrete core and spiral reinforcement at all loading levels. These dependencies have been obtained theoretically and reflect the main features of the force resistance of the elements. In the studied structures, the concrete core inside the spiral operates under volumetric compression. Moreover, as the axial shortening strain grows, not only axial compressive stresses increase gradually but also transverse stresses caused by the restraining impact of indirect reinforcement change constantly. This feature significantly complicates the deformation-strength calculation, which is based on the strain diagrams of materials. When calculating strength, flexibility is considered by increasing the initial eccentricity by the deflection value. When determining the deflection, the variable stiffness of the compressed bar along its length is considered. The comparison of the calculation and experimental results on the strength of compressed elements with indirect reinforcement indicates the reliability of the method proposed.

Abstract: The current study ensures the possibility of improving the mechanical and dielectric properties of polystyrene/kaolin reinforced with glass fibers. Polystyrene was dissolved using coloring in a ratio of 1 to 2. The prepared composites were studied and the results of the tensile, impact, hardness, thermal conductivity, and dielectric, has been obtained. Through the tensile results, it was found that with an increase in the addition of kaolin, both the yield points and the Young modulus decreased with a small and noticeable increase for the sample with the percentage of addition beyond 8 percent in Elongation, and shown high flexibility. The highest tensile strength appeared in the pure sample (x= 0%), where the value reached 22.85 MPa, while the lowest was for the sample with ratio 2%. While the impact result showed a noticeable increase with the increase in the percentage of addition of kaolin in the few percentages only. The sample with an addition rate of 8% kaolin, showed a high rebound energy, through the results of the energy absorption test, and it had the highest thermal conductivity and dielectric coefficient.

Abstract: Forming limit curves (FLCs) are important to predict failure against biaxial deformation in sheet metal forming. Particularly crucial is the detection and evaluation of the stable/instable transition which indicates necking and ultimately leads to rupture. In the past, it has been observed that specific processes, in particular free-form bending processes, might not be predicted well by conventionally evaluated FLCs, i.e. the Nakajima experiment, where tapered sheet metal specimens are stretched over a hemispherical punch until material failure. In the present study, FLCs are evaluated from such Nakajima tests and from notched tension tests (NTT) highlighting large differences in between both results. The differences in between the evaluation methodologies are discussed with respect to contact and bending strain in the forming zone. The FLCs of three tested sheet metal materials are compared to fracture strain resulting from an incremental bending process with free forming zone demonstrating an increased failure prediction accuracy by the NTT FLCs than by the conventional ones. In the light of these results, it is therefore encouraged to critically assess the application of FLCs obtained from NTTs to various free-form bending processes.

Abstract: This work aimed to improve the flexibility of keratin film by blending with zinc acetate. Films were prepared by casting methods before the characterization of their morphology, structure, and crystallinity. The keratin film with zinc acetate had a rougher texture than the native keratin film and changed absorption peaks appeared in the FTIR spectrum. Blending with zinc acetate (Zn(Ac)₂) helped to reduce the β-sheet structure as well as the crystallinity of the keratin film. This result clarified that Zn(Ac)₂ could improve the flexibility and properties of the brittle and fragile films.

Abstract: The aim of the paper is to explore and establish a base for a possible development of a more holistic and spatially-inclusive method for evaluating energy performance of buildings. This is to be achieved by envisioning building envelopes as arrangements of spatial zones, which could improve the overall energy balance of buildings but at the same time reduce the usage of construction materials and thus consumption of production energy and built-up space. The wall deconstructed in spatial zones, as shown e.g. in Antivilla by Brandlhuber-+, opens a series of questions about the future of existing building codes and certification tools. The potentials are discussed based on the aspects of flexibility, responsiveness, adaptability, replaceability and affordability. The analysis outlines the benefits of the inclusion of those paradigms in the definition of sustainable architecture, and at the same time exposes the lack of possibility to reflect their potential by the established certification criteria. The paper aims at opening the discussion about the limits and traps of quantifying architecture and calls for rethinking of established schemes of sustainability in building sector.

Abstract: Sustainable protection and expansion of the competitiveness of the industrial location Germany is an important topic of current research. How can manufacturing companies in high wage countries counter the challenges of market turbulences Crucial for the competitiveness of these companies is the compensation of wage and salary costs through highly efficient processes. A promising approach is to increase the responsiveness of a company. Responsiveness means, to react as quickly as possible to events or changes of the market, which are not yet evident and can not be foreseen at the time of production system planning. An increase of responsiveness enables companies to react quickly and flexible to market turbulences. The question arises, which market information are relevant, to which a company has to react as quickly as possible in order to handle market turbulence. This paper addresses this issue and identifies relevant information, that are already known during the phase of product development, and the unknown information of the market, to which an existing production system has to react in order to compensate market turbulences. The interplay of known and unknown information enables a responsive production control. The origin and usage of this information, which enables reactive production control, are a part of this article and are explained therein.

Abstract: Paper describes the objectives and effects of cell production as a production strategy, which allows reactions to market changes and customers’ needs and demands. First part of the paper describes the cell production, its principles and advantages. Second part of the paper is devoted to the description of the effect which has the profilation of flexible cell systems.

Abstract: Effect of latex film distributions on flexibility of redispersible polymer powders modified cement mortar were evaluated by scanning electron microscopy (SEM). Latex film distributions such as forming interpenetrated networks embedded in cement pastes, covering cement hydrates locally, bonding cement hydrates together, bridging aggregates were all beneficial for the improvement of flexibility of cement mortar. Latex film distributions such as remaining single particles in cement mortar, completing film formation unsuccessfully, film formation on surfaces of aggregates, bonding cement minerals to surfaces of aggregates may contribute little to the improvement of flexibility of cement mortar.