Projection System Research Articles

P‐9.8: Design Method of LCoS Projection System Based on Multiplexing of Imaging and Illumination Optical Paths

P‐9.8: Design Method of LCoS Projection System Based on Multiplexing of Imaging and Illumination Optical Paths

4‐1: Invited Paper: Effective Speckle Reduction in Laser Projection Systems Using a Low Cost Screen with Multilayer Structure

4‐1: <i>Invited Paper:</i> Effective Speckle Reduction in Laser Projection Systems Using a Low Cost Screen with Multilayer Structure

EFEKTIVITAS DIGITALITASI INFORMASI AKUNTANSI TERHADAP KINERJA KEUANGAN DI USAHA VALUTA ASING

This article intends to know Effectiveness of Digitalization an Accounting Information of Financial Performance in foreign exchange business. There are 5 system and website that used by company, for process the data until finish the report (Accurate), for attandance purpose and payroll system (Greatday), for daily transaction and profit target achievement (operating project system) with customer database, include 2 public service websites managed by the Government: (DJP online for tax), Bank Indonesia (Laporan Kegiatan Usaha/LKU). In this research, used qualitative method analysis by data before and after using Accounting Information system in company.

재건축사업에 있어 재건축부담금이 사업소요기간에 미치는 영향에 관한 연구

The purpose of this study is to examine how the reconstruction levy system for housing reconstruction and maintenance projects affects the project period, review major procedures and contents that affect the project period by stage, analyze problems, and improve the system. We are trying to find a solution. Due to the influence of the reconstruction levy system, which has been reimposed since 2018, the total project period and the project period for each major stage of the reconstruction project are changing, making decision-making difficult, resulting in unreasonable results. This shows that changes in government systems and policies bring uncertainty to the overall project period, lowering predictability. Accordingly, in this study, we collected and reviewed empirical data related to the reconstruction charge for each business complex for reconstruction projects in Seoul, analyzed the impact of the reconstruction levy on the project period through statistical analysis such as t-test, and analyzed the impact of the reconstruction levy on the project period. We looked at the causes of unreasonable problems, such as delays in the project period for each major stage and difficulty in predicting. As a solution, it was proposed to revise, supplement, and improve the procedure for calculating the estimated contribution under the Urban Development Act. Forecasting the project duration in a reconstruction project is an important feasibility analysis indicator and decision-making tool. As the reconstruction burden affects the project period, in order to smoothly promote the reconstruction project, a system that can reasonably estimate and predict the project cost share and reconstruction burden is established, and the goal of the urban development project is to provide high-quality urban areas in the city center. We hope that by supplying housing, we will be able to achieve great results in improving the residential environment and stabilizing the housing market.

Broker's Role and Responsibility in Commercial Brokering Contracts in Saudi Law

As trade and economic activities expand and spread in this era, the brokerage contract plays an important role in wealth trading and the exchange of goods and services in various trade, industrial, and other fields. A professional acquires the status of a merchant for this work, whether a natural person or a legal entity. The need for brokers and intermediaries continues to increase constantly due to their skills and expertise in bridging views and narrowing the gap between contractors, facilitating the conclusion of transactions. This underscores the impact of the broker's role on commercial and economic life and the necessity to develop laws governing their business, especially given the ambiguity in regulating this topic. From this perspective, the present research examines the broker's role and responsibility by adopting a comparative and analytical descriptive approach. The research is structured into three chapters, aiming to investigate the broker's role and responsibility in performing the functions of the brokerage contract, preserving documents, ensuring implementation, and refraining from prohibited practices. The goal is to draw the most important findings and recommendations, which include recommending the standardization of brokering and real estate brokering procedures, harmonization between the business transaction system project and the real estate brokerage system, recommending the establishment of a private center for trade brokerage with independence and legal person status, and suggesting the addition of some important provisions.

Operator guidance systems in road construction: a technological mediation perspective

PurposeUsing real-time support systems may help operators in road construction to improve paving and compaction operations. Nowadays, these systems transform from descriptive to prescriptive systems. Prescriptive or operator guidance systems propose operators actionable compaction strategies and guidance, based on the data collected. It is investigated how these systems mediate the perceptions and actions of operators in road pavement practice.Design/methodology/approachA case study is conducted on the specific application of an operator guidance system in a road pavement project. In this case study, comprehensive information is presented regarding the process of converting input in the form of data from cameras and sensors into useful output. The ways in which the operator guidance systems translate data into actionable guidance for operators are analyzed from the technological mediation perspective.FindingsOperator guidance systems mediate actions of operators physically, cognitively and contextually. These different types of action mediation are related to preconditions for successful implementation and use of these systems. Coercive interventions only succeed if there is widespread agreement among the operators. Persuasive interventions are most effective when collective and individual interests align. Contextual influence relates to designs of the operator guidance systems that determine human-technology interactions when using them.Originality/valueThis is the first study that analyzes the functioning of an operator guidance system using the technological mediation approach. It adds a new perspective on the interaction between this system and its users in road pavement practice.

Management of information systems projects in virtual environments and distributed teams

In today's business environment, effective information systems project management has evolved with the increasing adoption of virtual environments and distributed teams. This article addresses the challenges and best practices in managing information systems projects in virtual contexts, where teams work remotely and collaborate through digital tools. It highlights the advantages and pitfalls of this modality, as well as strategies to maximize efficiency and communication in this type of projects.In this context, the article addresses the challenges and best practices in managing information systems projects in virtual environments and with distributed teams. Through a comprehensive review of the current literature and the analysis of relevant cases, key strategies to optimize communication, coordination and success in this type of projects will be explored.

Interaction mechanisms of interface management risks in complex systems of high-speed rail construction projects: an association rule mining-based modeling framework

PurposeThis study aims to develop an interface management risk interaction modeling and analysis methodology applicable to complex systems in high-speed rail construction projects, reveal the interaction mechanism of interface management risk and provide theoretical support for project managers to develop appropriate interface management risk response strategies.Design/methodology/approachThis paper introduces the association rule mining technique to improve the complex network modeling method. Taking China as an example, based on the stakeholder perspective, the risk factors and significant accident types of interface management of high-speed rail construction projects are systematically identified, and a database is established. Then, the Apriori algorithm is used to mine and analyze the strong association rules among the factors in the database, construct the complex network, and analyze its topological characteristics to reveal the interaction mechanism of the interface management risk of high-speed rail construction projects.FindingsThe results show that the network is both scale-free and small-world, implying that construction accidents are not random events but rather the result of strong interactions between numerous interface management risks. Contractors, technical interfaces, mechanical equipment, and environmental factors are the primary direct causal factors of accidents, while owners and designers are essential indirect causal factors. The global importance of stakeholders such as owners, designers, and supervisors rises significantly after considering the indirect correlations between factors. This theoretically explains the need to consider the interactions between interface management risks.Originality/valueThe interaction mechanism between interface management risks is unclear, which is an essential factor influencing the decision of risk response measures. This study proposes a new methodology for analyzing interface management risk response strategies that incorporate quantitative analysis methods and considers the interaction of interface management risks.

The intensity inhibition strategy for indoor light sources during structured light measurement

During the measurement of structured light, different types of ambient light may cause some interference with the imaging process of grating projection. Therefore, this paper provides a descriptive method of the intensity of ambient light based on the polarization information. This method describes the degree of influence of ambient light on the grating projection system with the Mueller matrix of the target object and then processes the grating image in the frequency domain to reduce the influence of ambient light on the grating projection system. The final experimental results indicate the correctness of the proposed method.

Convergence analysis of high-order IMEX-BDF schemes for the incompressible Navier–Stokes equations

In this paper, we consider developing high-order temporal integration schemes for the unsteady incompressible Navier–Stokes equations in bounded two-dimensional domain subjected to the periodic boundary conditions. Utilizing the k-step (k=3,4,5) backward differentiation formula (BDF) coupled with the implicit–explicit (IMEX) treatment of the nonlinear convective term in an anti-symmetry form, a class of IMEX-BDFk schemes up to fifth-order in time are constructed and analyzed. By imposing a zero-mean constrain on the finite-dimensional space for the pressure, the proposed numerical schemes are proven to be uniquely solvable. Based on the recent theoretical framework consisting of a class of discrete orthogonal convolution kernels, rigorous L2 norm error estimates for both the velocity and the pressure are established by using a novel divergence free projection system. The proposed schemes are then implemented in two benchmark experiments, including a Taylor–Green vortex problem and a double shear layer flow at various high Reynolds numbers. Numerical results demonstrate the expected solution accuracy and the computational effectiveness in simulating the realistic flow dynamics.

Robotized technologies for enhanced shipyard operations: challenges and solutions

Large component manufacturing relies heavily on manual operations and human workers. Human-centric solutions can preserve industry-specific knowledge, extend capabilities, and improve job performance. Three robotized technologies were developed for shipyard operations: ABB™ and KUKA™ robot hand-guiding systems (HGS), a lightweight collaborative system for plasma cutting, and a cost-effective 3D projection system for retrofitting. These technologies were developed at the open didactic factory, which served as platforms for rapid technological advancement. The HGS was integrated with ABB™ and KUKA™, and the 3D projection technology and lightweight collaborative system offered a cost-effective solution for small and medium shipyards. However, transitioning to non-flat surfaces presents challenges due to geometric variations and discrepancies between the computer-aided design model and the actual component.

A multi-criteria decision-making framework for sustainable road transport systems: Integrating stakeholder-cost-environment-energy for a highway case study in United Arab Emirates

Existing lifecycle assessment models narrowly concentrate on limited parameters, disregarding system ecology and multi-stage stakeholder integration with sequestered analyses. Assimilation of new transport technologies with traditional design-bid-build decision-making paradigm should acknowledge sustainability triple-bottom-line social, cost, and environmental impacts, across all lifecycle stages for a system-wide optimisation. This study presents a multilevel framework to evaluate road transport system projects utilising 1) stakeholder engagement for flexibility in establishing key performance indicators, 2) passenger surveys to identify what encourages mode choice towards public transport, 3) microsimulation models, lifecycle cost and lifecycle analysis for quantitative assessment, 4) analytic hierarchy for qualitative assessment, and finally 5) multi-criteria modelling with stakeholder expert group preferences. Framework is applied to a 5-lane dual carriageway project in Abu Dhabi, analysing eight virgin and recycled material-based and public transport service alternatives. Study revealed the significance of saved user time, reduced fuel consumption during use phase and vehicle operational costs as the highest lifecycle impact generators. The total sustainability performance across the lifecycle for all alternatives was affected by traffic gridlock formation due to traffic growth in later years and lack of traffic load reduction strategies. Results showed that an autonomous vehicle-based bus rapid transit service coupled with recycled material to construct the road significantly reduced lifecycle cost (51.1%), energy (55.6%) and pollutant (54.5%-CO2, 49.7%-NOx, 24.1%-PM) burdens. It exhibited effectiveness of system choice using lifecycle assessment over the typically fragmented project planning and evaluation approach. Overall, framework exhibited robustness against unit cost and LCI uncertainties, fuel distribution assumptions, discount rate, and indicator weights variations based on priorities of different stakeholder groups.

Study on Speckle Noise Reduction in Laser Projection Displays

Laser speckle has a negative effect on laser projectors, so reducing laser speckle is crucial for the development of laser projector displays. We primarily focus on studying the laser speckle contrast of laser projector displays and the mechanism for reducing speckle. Based on the theory of decreasing temporal and spatial coherence of laser light, this report derives the complete formula for calculating speckle contrast in a laser projector display and provides detailed calculation procedures. According to the comprehensive formula, the primary factors influencing speckle contrast encompass wavelength, spectrum, angles of incidence or observation of lasers, the roughness of the screen surface, the number of independent speckle patterns generated by a moving diffuser, and the number of resolution elements within one eye resolution element in the projector lens. Various methods have been used in the projection engine to suppress speckle, and the main factors for reducing speckle have been verified through theoretical calculations and experimental verification. At a testing distance of 700 mm and with an F-number of 41.7 for the detector lens, the RGB laser speckle contrasts were measured to be 9.1%, 7.3%, and 10.4%, respectively, which aligns well with the results obtained from theoretical calculations. Meanwhile, the speckle contrast of the white field was also measured, yielding a result of 5.6%. The speckle contrast becomes imperceptible when the viewing distance exceeds 2000 mm in our projection system.

Mapping of Various Quality Management System Model to ISO 9001:2015

Measurement of Quality Management Systems (QMS) in construction projects is very important to assess the fulfillment of quality standards. A comprehensive and up-to-date standard setting is paramount. Much research has been done to develop a Quality Management System (QMS), but only focused on the quality management system in general by means of interviews and statistics. There are still only a few studies that focus on determining quality variables based on ISO 9001:2015, but they do not consider other Quality Management Systems (QMS) to obtain variables that are not in ISO 9001 2015. This research aimed to map out ISO 9001:2015 to find additional variables that are not present inside it. Six Sigma, Deming, Total Quality Management (TQM), Quality Management System (QMS), Baldrige Performance Excellence Framework, and LEAN Manufacturing are models for developing Quality Management Systems (QMS) that are widely applied in the construction industry today. This research produced eight additional variables as audit materials, which were expected to make ISO 9001:2015 better in its application and development in construction services. The eight variables were breaking down barriers between departments, eliminating pressure, eliminating arbitrary numerical targets, respecting people, contributing to society, reducing cycle time, increasing process transparency, and focusing on global process control. This research provides factors from a more varied and up-to-date quality management system that complements ISO 9001:2015&#x0D; Keywords: mapping, Measurement of Quality Management System (QMS)

Multiagent robotic systems and exploration algorithms: Applications for data collection in construction sites

AbstractThe construction industry has been notoriously slow to adopt new technology and embrace automation. This has resulted in lower efficiency and productivity compared to other industries where automation has been widely adopted. However, recent advancements in robotics and artificial intelligence offer a potential solution to this problem. In this study, a methodology is proposed to integrate multirobotic systems in construction projects with the aim of increasing efficiency and productivity. The proposed approach involves the use of multiple robot and human agents (HA) working collaboratively to complete a construction task. The methodology was tested through a case study that involved 3D digitization of a small, occluded space using two robots and one HA. The results show that integrating multiagent robotic systems (MARS) in construction can effectively overcome challenges and complete tasks efficiently. The implications of this study suggest that MARS could revolutionize the industry.

Risk management in large-scale information system projects

This article deals with project management in information systems, whose relevance lies in the vital importance of these systems in modern companies. Information systems are essential for decision making and data management in today's interconnected world. Project management, on the other hand, coordinates elements such as scope, resources, costs, schedules and risks to achieve defined objectives. The systems development life cycle (SDLC) structures the process, encompassing phases such as scope definition, planning, execution, monitoring and closure. These phases are integrated with risk management, which identifies, evaluates and mitigates threats and opportunities. Mitigation strategies act before adversity, while contingency planning prepares for the unforeseen. That is why risk management is integrated throughout the project life cycle to anticipate and address challenges. The combination of both aspects is critical in a constantly evolving technology environment. In addition, organizational culture and communication play a critical role. A culture of awareness and accountability, transparency in communication and active stakeholder participation are essential. Training and continuous adaptation allow learning from past experiences and improving practices.

Emerging technologies in information systems project management

The article discusses emerging technologies in information systems project management. Project management is a modern discipline that began to take shape from 1900 and has evolved and adapted to the needs of society and business. Emerging technologies such as artificial intelligence, blockchain, augmented and virtual reality, and process automation are transforming the way information systems projects are managed. These technologies can be used to analyze large amounts of data, ensure data integrity and security, visualize a project's design and perform virtual testing, and automate tasks to reduce project time and cost. It is important for companies to be aware of these technologies and use them effectively to improve the efficiency and profitability of their projects.

Locus Coeruleus-Norepinephrine System: Spheres of Influence and Contribution to the Development of Neurodegenerative Diseases.

Locus coeruleus is a small bilateral nucleus in the brainstem. It is the main source of norepinephrine (noradrenaline) throughout the central nervous system (about 70% of all norepinephrine in the central nervous system), and, as shown in numerous studies, it is involved in regulating a significant number of functions. The detailed study of the functions of the Locus Coeruleus (LC) and its significance in human life became possible only after the development of histofluorescence methods for monoamines in the 1960s. The widespread locus coeruleus-norepinephrine (LC-NE) projection system regulates the entire central nervous system and modulates sensory processing, motor behavior, arousal, and cognitive processes. Damage to the LC and the associated decrease in norepinephrine levels are involved in a wide range of clinical conditions and pathological processes. Although much about the anatomy and physiology of the LC is currently known, its ultimate role in the regulation of behavior, control of the sleep-wake cycle, stress response, and the development of pathological conditions (such as Alzheimer's disease, dementia, depression, suicidal behavior, chronic traumatic encephalopathy, and Parkinson's disease) is not fully understood. Non-invasive visualization of the LC can be used for differential diagnosis, determining the stage of the disease, and predicting its course. Studying the dysfunction of the LC-norepinephrine system, involved in the pathogenesis of various neurological diseases, may ultimately form the basis for the development of new treatment methods based on the pharmacological elevation of norepinephrine levels. In this review, we will attempt to highlight the key points regarding the structure and function of the Locus Coeruleus, as well as outline the main directions and prospects for its study.

Medium-term exposure to size-fractioned particulate matter and asthma exacerbations in China: A longitudinal study of asthmatics with poor medication adherence

BackgroundStudies have shown that short- and long-term exposure to particulate matter (PM) can increase the risk of asthma morbidity and mortality. However, the effect of medium-term exposure remains unknown. We aim to examine the effect of medium-term exposure to size-fractioned PM on asthma exacerbations among asthmatics with poor medication adherence. MethodsWe conducted a longitudinal study in China based on the National Mobile Asthma Management System Project that specifically and routinely followed asthma exacerbations in asthmatics with poor medication adherence from April 2017 to May 2019. High-resolution satellite remote-sensing data were used to estimate each participant's medium-term exposure (on average 90 days) to size-fractioned PM (PM1, PM2.5, and PM10) based on the residential address and the date of the follow-up when asthma exacerbations (e.g., hospitalizations and emergency room visits) occurred or the end of the follow-up. The Cox proportional hazards model was employed to examine the hazard ratio of asthma exacerbations associated with each PM after controlling for sex, age, BMI, education level, geographic region, and temperature. ResultsModelling results revealed nonlinear exposure-response associations of asthma exacerbations with medium-term exposure to PM1, PM2.5, and PM10. Specifically, for emergency room visits, we found an increased hazard ratio for PM1 above 22.8 µg/m3 (1.060, 95 % CI: 1.025–1.096, per 1 µg/m3 increase), PM2.5 above 38.2 µg/m3 (1.032, 95 % CI: 1.010–1.054), and PM10 above 78.6 µg/m3 (1.019, 95 % CI: 1.006–1.032). For hospitalizations, we also found an increased hazard ratio for PM1 above 20.3 µg/m3 (1.055, 95 % CI: 1.001–1.111) and PM2.5 above 39.2 µg/m3 (1.038, 95 % CI: 1.003–1.074). Furthermore, the effects of PM were greater for a longer exposure window (90–180 days) and among participants with a high BMI. ConclusionThis study suggests that medium-term exposure to PM is associated with an increased risk of asthma exacerbations in asthmatics with poor medication adherence, with a higher risk from smaller PM.

PENERAPAN APLIKASI ARCGIS DALAM PEMBUATAN PETA LOKASI DESA RIDOMANAH

Location map is a location image that shows related locations on the earth's surface, location maps are made using a certain projection system so that they can be presented in a flat plane. The function of the location map is to show the size of the area, distance and direction of a place on the earth's surface. This map is made for comparison with the existing map in 2020. Ridomanah Village needs a location map so that it can compare with the existing location map with 2020 and compare with 2024 whether there is an expansion or widening of the distance, therefore the latest location map is made so that it can be clearly seen the area and distance of Ridomanah Village. The ArcGIS application has high capabilities in making digital maps to spatial analysis. The community service method applies science and technology diffusion by utilising the ArcGIS application combined with the socialisation method. The impact of community service is that the community and village officials can find out the distribution of the population, find out the distribution of production forests.