Core System Research Articles

Physical mechanisms of exit dynamics in microchannels of nonequilibrium transport systems

In the field of molecular nonequilibrium transports, physical mechanisms of multiple reaction dynamics of these systems are the core of deep understanding complex reactions and transport mechanisms. In order to explore related mechanisms, establishing multiple systems coupled with tremendous exit dynamics and studying their exit dynamics properties are quite vital. Beyond previous researches, new stochastic transport processes are emphasized here. Multiple new exit dynamic systems are established, which are motivated by the multiplicity of paths and products of real biochemical processes in organisms. In order to ensure research universality, core system modeling factors are fully considered. Countable parallel orbits, uniform connection with external sources, countable parallel orbits as subsystems in middle lattices and influences of all lattices on transport trajectories on dynamic properties are analyzed. Dynamic properties of different particles located in orbits are explored by deeply studying average exit time and time scale. Quantitative spatiotemporal impacts are extensively studied. The rationality of average exit time as a time scale in the universal exit dynamic system is proved. Main findings and fruitful results can not only serve as theoretical bases for broadening reaction path modeling, but also be helpful to support understanding nonequilibrium transport mechanisms, especially stochastic biochemical processes.

Blue Seaports: The Smart, Sustainable and Electrified Ports of the Future

Seaports are at the forefront of global trade networks, serving as hubs for maritime logistics and the transportation of goods and people. To meet the requirements of such networks, seaport authorities are investing in advanced technologies to enhance the efficiency and reliability of port infrastructures. This can be achieved through the digitalization and automation of core systems, aimed at optimizing the management and handling of both goods and people. Furthermore, a significant effort is being made towards a green energy transition at seaports, which can be supported through marine renewable sources. This promotes energy-mix diversification and autonomy, whilst reducing the noteworthy environmental footprint of seaport activities. By analyzing these pertinent topics under the scope of a review of container-terminal case studies, and these ports’ respective contexts, this paper seeks to identify pioneering smart seaports in the fields of automation, real-time management, connectivity and accessibility control. To foster the sustainable development of seaports, from an energy perspective, the potential integration with marine renewable-energy systems is considered, as well as their capabilities for meeting, even if only partially, the energy demands of seaports. By combining these fields, we attempt to construct a holistic proposal for a “model port” representing the expected evolution towards the seaports of the future.

Anti-interference Performance of the Temperature Acquisition System for the Vacuum Thermal Test

The thermal test temperature acquisition system is one of the core systems in the thermal test of the spacecraft. It uses thermocouple sensors for temperature data acquisition, and its data stability directly affects the success or failure of the thermal test task. The equipment types in the original thermal test environment were single, and the electromagnetic compatibility design was weak. With the increase of the types of test equipment in the thermal test, the electromagnetic interference in the test environment is becoming more and more serious and even directly affects the stability of temperature data collection. Based on the principle of thermocouple temperature measurement and electromagnetic compatibility, this paper establishes relevant models for analysis and simulation and obtains methods to improve system electromagnetic compatibility under different interference conditions. And in a certain thermal test, using the simulation results of the model, the corresponding circuit improvement was carried out, which finally reduced the influence of electromagnetic interference on the system and ensured the smooth progress of the task.

The Maturity Model of Data Quality Management in Banking Industry: PT XYZ Core System Customer Data

PT XYZ, engaged in the financial industry, has a target to become a leading company in Southeast Asia and has been supported by more than 200 million customer data in its core system. This huge amount of data is expected to create business opportunities, build a risk-aware culture, and increase supremacy in the business strategy of PT XYZ. These things can be achieved if the data used is of good quality data. In fact, found anomalies in a large number of customer data. To get recommendations for improving the quality of customer data, it is necessary to assess the quality of customer data. The customer data quality assessment in this study uses the method introduced by Loshin (2011). Loshin’s Data Quality Management Model (DQMM) adopts a capability maturity level model in building its characteristic matrix. Maturity levels obtained are 3.6 (expectations), 3.6 (dimensions), 4.4 (policy), 3.8 (procedures), 4.2 (governance), 3.8 (standardization), 4, 2 (technology), and 3.8 (performance management). Regarding the expectation that senior management can achieve the highest level of data quality, 9 strategic recommendations were produced 9 strategy recommendations were submitted to PT XYZ is the result of mapping between criteria that have not been met with data quality management activity in Data Management Body of Knowledge (DMBOK) version 2.0. Measurement and monitoring of good data quality is the most influential recommendation for PT XYZ.

On chip network with increased performance for efficient wireless communication

Core systems with network transactions deployed semiconductor materials to develop wireless networks-on-chip to minimize latency with increased performance. For transmitting data from the source point towards the target point, an appropriate reconfigurable routing method has to be deployed with respect to nodes. For overhead on-chip communication that involves the linking of many cores in a single chip, congestion may occur which has to be eliminated. A marching memory arbitrator is deployed in the path that is prone to congestion which computes the port as a buffer. The static degradation of energy power utilization in the router is solved by using a Marching memory buffer. The secure communication of data can be deployed with hash, identity, and address verification blocks. The traffic is then relaxed by routing arbitrator and then data transmission is done through frequency division multiplexing in the communication channel with reconfigurable routing. The analysis of simulation results is found to have a better throughput, less latency, and reduced power consumption.

BURGULU YÜKSEK YAPILARIN YANAL YÜKLER ALTINDA DAVRANIŞI

Twisted tall building structures have recently been used as an architectural and structural form. On the other hand, there are very few studies on the behavior of twisted tall buildings under seismic and wind lateral loads. In this paper, the behavior of twisted tall buildings under seismic and wind-induced loads is investigated and compared with their prismatic counterpart. As a case study, a twisted building in Miami, Florida, is modified by twisting all floor levels with an angle of 3 degrees. Lateral wind forces and seismic forces are considered for this location and using ASCE 7-16. The 3-dimensional models are created using ETABS for analysis. The structural system of the building consists of a composite core system. The floor system consists of a post-tensioned concrete slab and the surrounding twisted columns are reinforced concrete. For the analysis of twisted tall building structures under lateral loads such as wind loads and seismic loads, the application of provisions and the behavior of prismatic and twisted tall building structures are discussed. In the study, it was found that the lateral stiffness of the twisted tall building under seismic loads is lower than that of the prismatic tall building.

In Vitro Comparison of Fracture Resistance of Severely Damaged Primary Anterior Teeth Restored with Different Post and Core Systems.

This study aimed to compare the fracture resistance (FR) of severely damaged primary anterior teeth restored with five different post and core systems. This in vitro, experimental study evaluated 60 extracted primary maxillary central incisors. The teeth were horizontally sectioned at 1 mm above their cementoenamel junction (CEJ), underwent pulpectomy, and their root canals were filled with Metapex paste. After post space preparation and sealing of root fillings with light-cure glass ionomer (1 mm thickness), the teeth were randomly assigned to five groups (n = 12) of (1) glass fiber post and everX composite (reinforced with short fibers), (2) glass fiber post and bulk-fill composite, (3) everX composite post and core, (4) bulk-fill composite post and core, and (5) Filtek conventional composite post and core. The teeth underwent 5,000 thermal cycles between 5°C and 55°C, and their FR was measured in a universal testing machine (0.5 mm/min, 148°). The mode of failure was also determined. Data were analyzed by ANOVA and Tukey's test at 0.05 level of significance. The FR was the highest in fiber post and everX composite, and the lowest in Z250 conventional composite post and core group (P < 0.001). The FR of fiber post and everX composite group was significantly higher than that of everX composite post and core (P = 0.04), bulk-fill composite post and core (P = 0.001), and Z250 composite post and core (P < 0.001) groups. The frequency of repairable fractures was the highest in glass fiber post plus everX composite (91.66%) and the lowest in Filtek conventional post and core group (66.66%) (P > 0.05). Within the limitations of this in vitro study, the results showed that restoration of severely damaged primary maxillary central incisors with glass fiber post and everX composite reinforced with short fibers enhanced their FR, and increased the chance of reparability in case of restoration fracture. This technique may be recommended for the restoration of primary anterior teeth since it is simple and saves time.

Leadership Style and Market Orientation: The Mediating Role of Internal Marketing

This study aims to investigate the impact of path-goal leadership styles (directive, participative, supportive, and achievement-oriented) on the market orientation of Jordanian commercial banks and the role of internal marketing as a mediating variable. A quantitative survey methodology was used to collect data from 630 branch managers of thirteen commercial banks listed on the Amman Stock Exchange in Jordan. Only 196 branch managers fully responded to the questionnaire. The measurement model fit and the significance of the theoretical relationship between variables were determined using structural equation modeling. The results confirmed that supportive, participative, and achievement-oriented styles have a positive impact on internal marketing, while directive styles have a negative impact. Internal marketing has a positive direct impact on market orientation. The impact of path-goal leadership styles on market orientation was indirect through internal marketing, which means that internal marketing fully mediates the relationship between path-goal leadership styles and market orientation. Commercial banks should integrate internal marketing as a strategy into their core operations and systems to meet employees’ demands and the bank’s goals. This integration shall make employees show their sincere organizational commitment so that they can express the attitude of organizational citizenship behaviors that are beneficial for the banks’ operations and survival.

A method for successful collection of multicores and gravity cores from Antarctic subglacial lakes

AbstractDuring the 2018–2019 Antarctic field season, the Subglacial Antarctic Lakes Scientific Access project team cleanly accessed Mercer Subglacial Lake, West Antarctica, to sample water and sediments beneath 1087 m of overlying ice. A multicorer was successful in sampling the sediment–water interface, with 4 deployments retrieving 10 cores between 0.3 and 0.4 m in length. Gravity coring was also successful, retrieving cores of 0.97 and 1.78 m in glacial diamict. However, sediment cores retrieved by the gravity cores were shorter than the core barrel penetration (as measured by mud streaks on the outside of the coring system), indicating that the system can likely be improved. This manuscript describes the design, implementation, successes, and lessons learned while coring sediments in a subglacial lake.

A Bibliometric and Visualization Analysis of Knowledge Mapping in Digital Economy Research, 1992–2022

Digital economy is a vital driving force for countries to promote economic recovery, rebuild competitive advantages and enhance governance capacity. Extensive research has been conducted in this field. In this paper, the text analysis tool of Bicomb2.04 and the knowledge graph visualization tool of CiteSpace are applied to analyze the digital economy research from 1992 to 2022, and a total of 7874 articles retrieved from the SSCI and SCI of the WOS core database are collected as the research data. The analysis provides a comprehensive overview of the research status of the digital economy, including the distribution of literature, research institutions and regions, research funds and publications, research authors, and cooperation networks. The core progress and frontier of international research are further analyzed according to the evolution of hot keywords, core system clustering, and the hot emergent words frontier. The results show that (1) the academic circle has a good overall research trend on the digital economy, which can be divided into three steadily rising research stages. The researchers take digital innovation as the core and extend it to the application of digital innovation, which has made groundbreaking theoretical contributions, but has not yet formed a team with field influence. (2) The evolution of hot keywords can be divided into four stages. Through hot clustering analysis, a basic theoretical system is constructed with digital technology and innovation as the core and digital governance, digital application, and digital path as the means. (3) The analysis of frontier areas also identified the digital platform economy, big data technology innovation, digital economy statistics, and the gig economy as potential research directions for the future. This study provides a guide for researchers to promote further research on the digital economy and is of great significance for promoting digital development level and constructing global digital ecosystem.

Direct displacement-based design of SEDRC systems considering higher mode effects

Self-centering energy-absorbing dual rocking core (SEDRC) system was recently proposed for obtaining damage-free performance under design earthquakes or low damage under extreme earthquakes in steel building structures. Although the SEDRC system can mainly deform based on the fundamental mode shape, the higher modes may significantly impact the structural element forces. This research intends to investigate the effects of higher mode on the seismic performance and structural member force demands of the SEDRC system under earthquakes and propose a performance-based design (PBD) method considering the higher mode effects. The formulation for calculating the design base shear pondering the influence of higher mode is deduced. The detailed design steps and equations for calculating the force demands of structural members are presented. Three archetypes, including nine-, fifteen-, and twenty-story SEDRC systems, respectively, are designed according to the PBD method. Moreover, the other six corresponding archetypes are designed according to the previous design process without consideration of higher mode effects as comparative buildings. Nonlinear dynamic analyses were performed to evaluate the seismic responses of the designed structures. The analysis results validate the high precision of the proposed methodology in designing multi-story to high-rise SEDRC systems.

ENTERPRISE ARCHITECTURE POS (EAPOS)

PT Pos Indonesia (Persero) is a State-Owned Enterprise (BUMN), in 2018 in line with KD72/2018 concerning the Organizational Structure of PT Pos Indonesia (Persero) and KD.35/2018 concerning the Transition Period of Information and Technology Organizations, the IT function organization has smelting is carried out to enter the business unit for the core system, so a guideline is needed for information technology governance or IT management, which is currently decentralized. To be able to standardize the structure and operation of technology support in all overall company functions, including business, data, applications and technology, a simple study is needed in the form of a blueprint or company blueprint which consists of information technology management components so that it can provide an overview and steps steps to assist in formulating EAPOS which bridges business in harmony with IT governance at PT Pos Indonesia (Persero).

Structural Improvement of Differential Motion Assembly in In Situ Pressure-Preserved Coring System Using CFD Simulation

In situ pressure-preserved coring (IPP-Coring) is one of the most efficient methods for identifying the scale of the oil and gas content. However, the differential motion assembly of the IPP-Coring system often undergoes ball and ball seat seal failure and sticking due to surface erosion, and a greater pressure drop may unexpectedly trigger the assembly. This paper addresses these issues by improving the hydraulic structure of an assembly based on a deep understanding of the flow characteristics in the assembly, thus increasing the success rate of the IPP-Coring. Computational fluid dynamics (CFD) was employed to investigate flows in a differential motion assembly. The effects of the diameter and outlet structure of the ball seat on the fluid status, velocity, and pressure distribution were thoroughly analyzed. When the ball seat diameter increased from 30 to 40 mm, the maximum velocity and pressure drop decreased to 0.55 and 0.2 times their original values, respectively. There was a severe vortex area in the differential motion assembly due to the presence of the ball seat, but changing the outlet structure in the ball seat to an arc structure decreased the length of the vortex area and the fluid velocity near the wall to 0.7 and 0.4 times, respectively, compared with those with the original right-angled structure. In addition, the pressure drop decreased to 0.33 times the original value. Thus, the hydraulic structure of the assembly was improved, and a 40 mm diameter ball seat and an arc-shaped ball seat outlet were selected. Particle trajectory and erosion calculation results showed that the improved structure has a lower particle velocity and less impact on the wall, and the average erosion rate is only 0.42 times the value of the original structure. Due to the better erosion resistance and smaller pressure drop, the improved structure shows promise for field performance.

A Comprehensive Review on Chemical Synthesis and Chemotherapeutic Potential of 3-Heteroaryl Fluoroquinolone Hybrids

Fluoroquinolones have been studied for more than half a century. Since the 1960s, four generations of these synthetic antibiotics have been created and successfully introduced into clinical practice. However, they are still of interest for medicinal chemistry due to the wide possibilities for chemical modification, with subsequent useful changes in the pharmacokinetics and pharmacodynamics of the initial molecules. This review summarizes the chemical and pharmacological results of fluoroquinolones hybridization by introducing different heterocyclic moieties into position 3 of the core system. It analyses the synthetic procedures and approaches to the formation of heterocycles from the fluoroquinolone carboxyl group and reveals the most convenient ways for such procedures. Further, the results of biological activity investigations for the obtained hybrid pharmacophore systems are presented. The latter revealed numerous promising molecules that can be further studied to overcome the problem of resistance to antibiotics, to find novel anticancer agents and more.

Characteristics of cloud properties over South America and over Andes observed using CloudSat and reanalysis data

ABSTRACT CloudSat profile of attenuated corrected radar reflectivity (Ze) and cloud mask data are used to investigate the cloud properties over South America (SA) during Austral Summer monsoon seasons. Deep convective core (DCC), deep & intense convective systems (DCSs & ICSs), and cloud clusters (CCs) are defined based on the Ze and cloud mask values. The spatial distributions of DCCs show that land-dominated areas have higher frequency of DCCs and Atlantic Ocean has less DCCs. The Pacific Ocean does not consist of DCCs, whereas eastern flank of Andes has higher frequency of DCCs compared to western flank of the Andes. North La Plata basin (Sierra de Cordoba) has a higher fraction of deeper (shallower) DCCs. Deep convection over the Sierra de Cordoba and South La Plata Basin is characterized by precipitation-size particles compared to cloud-size particles, whereas deep convection over north La Plata Basin is dominated by mostly cloud-size particles. The horizontal span of DCSs and ICSs is higher over south La Plata Basin and Atlantic Oceans compared to other SA areas. Sierra de Cordoba (Atlantic Ocean) has the highest (lowest) frequency of small DCSs and vice versa. DCSs and ICSs show the opposite characteristic, as all the selected areas consist of a higher fraction of large (small) sized DCSs (ICSs). CCs develop more in horizontal than in vertical direction over the high latitude and vice versa over lower latitude. The CCs distribution reflects the orography and moisture flow pattern at the east and west side of Andes. The higher Ze, which is the proxy for rainfall, occurs at the eastern flank/slope of the Andes, and related to easterly moisture loaded synoptic flow, transported from Amazon and upslope flow along the slope.

Investigation into starting speed of stone in slurry shield circulation system

Slurry circulating system is the core system for transporting excavated stone from the excavation interface, and the flow characteristics of stone in circulating pipeline is the key to determine whether stone can be transported smoothly. Based on Computational Fluid Dynamics-Discrete Element Method (CFD-DEM) coupling method, the movement model of stone in horizontal straight pipe of circulation system is established, and the influence of stone shape coefficient and equal volume particle size on stone starting speed is studied. The simulation results indicate that under the condition of equal volume particle size of stone is same, starting speed of stone with different shapes is ellipsoid &gt; flat &gt; nearly spherical; When the equal volume particle size of stone is 38.5, 42.5, 53.3, 56.2 and 58 mm, the starting speed of stone is 0.48, 1.06, 1.26, 2.36 and 4.7 m/ s respectively, which increases exponentially with the increase of equal volume particle size. The conclusions can be helpful for setting the working parameters of circulation system.

Technological Impact of Online and Offline Teaching in Indian Context

India really does have the most youthful population on the planet, with an average age of just over 30 years, while also being the second most populous country in the world after China. The year 2020 commenced in India with high aspirations and potential, however, to stop the spread of the Covid-19 epidemic, the nation quickly went into lockdown. The education industry, which was severely impacted from primary to higher streams in school, colleges, and universities, is the most afflicted at this pivotal moment. Digital alternatives were simplified to cover the curriculum, and cell phones and other electronic devices that were officially forbidden in schools ended up being the sole supporting technology during the lockdown. One study was done with a focus on students, teaching staff, and parents of school-age children in order to examine the consequences of students' and teachers' abrupt adoption of online learning. The poll had 301 responses in all, and the outcomes were valid and optimistic. With the development of technology, the significance of online education as well as the advantages and disadvantages of both modes of education were amplified. The findings highlighted the shortcomings of the online education system as well as certain advantages of traditional or classroom instruction. Before introducing online education on a large scale in India, a developing nation, the government must first provide the essential facilities. The bedrock of how people survive and flourish is learning. People are educated to help them become contributing members of society through both online and offline learning. No learning method can be guaranteed to be 100 percent successful. As depending on just one of the aforementioned modes can never be particularly effective, it must be a combination of both, the best among these two core systems must be taken and combined.

Research on the Construction of Core System of Credit Bank in Vocational Education

Lifelong education and lifelong learning are increasingly implemented all over the world. The reform and development of education system and training mode are facing new opportunities and challenges. Based on the concept of lifelong education, we must establish the core system of credit bank as soon as possible so as to achieve the orderly operation of the credit certification, conversion, accumulation and exchange process of vocational education. Only in this way can we gradually establish an effective credit bank for vocational education, and achieve the vocational education goal of attracting social members to the lifelong learning system.

Coupling of CTF and RELAP5-3D Within an Enhanced-Fidelity Nuclear Power Plant Simulator

A robust and accurate multiphysics engineering simulator is being developed to model the core behavior and system response of pressurized water reactors. This simulator relies on the NESTLE and CTF computer codes to model the neutronics and thermal hydraulics (TH), respectively, inside the core on a nodal scale and on the Reactor Excursion and Leak Analysis Program—Three Dimensional (RELAP5-3D) to model the entire nuclear steam supply system. The RELAP5-3D model includes highly detailed nodalization and multidimensional flow modeling throughout the vessel. Previously, pin-resolved data generated via the Virtual Environment for Reactor Analysis core simulator were used to improve the accuracy of the NESTLE core predictions. The engineering simulator being developed as part of this work uses the 3KEYMASTER platform to couple the enhanced NESTLE model to a nodal-fidelity CTF model to balance run time with accuracy; NESTLE provides node-dependent powers to CTF, and CTF provides node-dependent coolant densities and fuel temperatures to NESTLE. An overlapping domain approach is used for the core TH in which RELAP5-3D provides core boundary conditions based on the system response and CTF provides a node-dependent coolant heating rate to the RELAP5-3D core solution. In the preliminary TH demonstration discussed in this paper, CTF and RELAP5-3D provided similar steady-state core predictions, indicating the hydraulic compatibility between the codes, as well as reasonable and expected behavior under hypothetical transient conditions. This provides an initial step in ongoing efforts toward a robust, multiscale TH/neutronics engineering simulator capability.

Optimization of Transient Overvoltage Heat Dissipation Characteristics of New Energy Vehicle Precharge Resistors

New energy vehicle (NEV) is a significant solution to the energy crisis and global warming. The promotion and widespread use of NEVs will depend on developing and modernizing their core technologies and components. As the three core systems of NEVs, the thermal management of the battery, motor, and electric control systems is increasingly essential. Herein, the precharge circuit's thermal management strategy is improved by studying the precharge resistor's thermal performance. Both intermittent and continuous high voltages are applied to the precharge resistor to study its temperature‐rising characteristics. It is demonstrated that thickening electrode can lengthen the precharge resistor's short‐circuit durability, increase its transient heat storage capacity during a short circuit of the precharge circuit, and reduce the maximum temperature of the resistor's shell and resistance wire. When the thickness is 3 mm, and the eccentricity is 18.5 mm, the heat storage capacity of the resistor under continuous high voltage can be increased by up to 82.32%, and that under intermittent high voltage can be increased by up to 52.92%.