Weak Impact Research Articles

Grazing-Induced Evolutions of Coexisting Orbits in a Vibro-Impact Smooth–Discontinuous Oscillator with a Unilateral Adjustable Rigid Wall

In this paper, a new vibro-impact bistable oscillator by installing an adjustable rigid wall to one side of the smooth–discontinuous (SD) oscillator, is constructed to analytically and numerically reveal its unique global dynamic characteristics. In the unperturbed case, there exist complex unilateral homoclinic structures transversal intersecting, grazing and nonintersecting with the impact boundary due to the adjustability of the rigid constraint. When weak vicious damping, weak periodic excitation and impact energy dissipation are considered, the influences of the adjustable rigid constraint and the evolutions from coexisting periodic orbits to chaos are analyzed through bifurcation diagrams, phase diagrams and Poincaré map and basins of attraction. As the position of the impact boundary moves, the orbits graze multiple times with the boundary, causing period-doubling bifurcations and presenting some new impacting periodic orbits and disconnected chaotic attractors. The vibro-impact SD oscillator also gradually loses stability due to the rapid migration of attractors among coexistence orbits.

Symmetry in Mesoscale Circulations Explains Weak Impact of Trade Cumulus Self‐Organization on the Radiation Budget in Large‐Eddy Simulations

AbstractWe investigate if mesoscale self‐organisation of trade cumuli in 150 km‐domain large‐eddy simulations modifies the top‐of‐atmosphere radiation budget relative to 10 km‐domain simulations, across 77 characteristic, idealized environments. In large domains, self‐generated mesoscale circulations produce fewer, larger and deeper clouds, raising the cloud albedo. Yet they also precipitate more than small‐domain cumuli, drying and warming the cloud layer, and reducing cloud cover. Consequently, large domains cool slightly less through the shortwave cloud‐radiative effect, and slightly more through clear‐sky outgoing longwave radiation, for a net cooling (−0.5 W ). This cooling is generally smaller than the large‐domain radiation's sensitivity to large‐scale meteorological variability, which is similar in small‐domain simulations and observations. Hence, mesoscale self‐organisation would not alter weak trade‐cumulus feedback estimates previously derived from small‐domain simulations. We explain this with a symmetry hypothesis: ascending and descending branches of mesoscale circulations symmetrically increase and reduce cloudiness, weakly modifying the mean radiation budget.

Landscape Design Proposal in Public Spaces: A Case of Düzce Uzun Mustafa Neighborhood

Public spaces are considered a critical process that determines the initial spatial perception of an individual in their environment and shapes their experiences and memories. These spaces include public buildings, open areas, and locations that are in constant interaction with the surroundings. The analysis of the landscape features of the physical environment aims to create an interaction between different uses in urban landscape design and to transform a busy street into a livable area. The surroundings of public buildings such as the Düzce Governorship Meteorology Directorate, Düzce Vocational School, and library in the Uzun Mustafa neighborhood of Düzce have passive urban open and green areas. In this study, the mentioned areas were evaluated, the landscape features of the physical environment were analyzed, and revision proposals related to urban landscape design were made. By utilizing the satellite image and zoning plan of the study area, it was aimed to eliminate elements that cause confusion in human psychology according to urban and landscape features. In the method of the study, internal and external factors were considered based on the project design processes of the area, and a SWOT analysis was conducted to minimize the impact of weaknesses and elements that pose threats in the area. As a result, this study aimed to create a more livable space that meets the needs of users in areas with passive, unused or undesigned surroundings of public buildings and to contribute more effectively to the daily life of the community in spaces with different functions.

Bearing fault feature extraction method for aperiodic stationarity caused by strong noise background

1. Rolling element bearings are the critical parts of every rotating machinery and their failure is one of the main reasons of the machine downtime and even breakdown. The significance of early failure detection cannot be overstated, as it plays a crucial role in maintaining the proper functioning of equipment, enhancing production efficiency, and ensuring safety. Among them, envelope analysis is the most effective and widely used approach, working according to the principle of linear filtering process of signals to remove undesirable components. However, the characteristic frequencies can be no longer evident or even overwhelmed due to the weak early failure signal. We propose an early fault feature extraction method that combines correlation entropy with an improved 2.5-dimensional square envelope spectrum. This approach is designed to overcome the relatively weak impact of early failures, which can be easily obscured by external background noise. Specifically, the correlation entropy matrix is simplified into a series of correlation entropies, and the formula for the higher-order spectrum is enhanced to achieve superior noise removal performance. Furthermore, to enhance the detection of the fault characteristic frequency (FCF), the Fourier transform in the improved 2.5-dimensional spectrum has been refined into a square envelope spectrum transform. Simulation results demonstrate that our proposed method excels at extracting early bearing fault characteristics and detecting inner and outer ring FCFs, thereby offering practical value.

The Effect of Green Supply Chain Management on Firm Performance Mediated by Green Innovation in Cimahi SMEs, Indonesia

The accelerated growth of economic activities, large-scale industrial expansion, and technological advancements have intensified competition, including among small and medium enterprises (SMEs). Green supply chain management (GSCM), which integrates environmentally conscious practices into supply chain activities, has become a crucial strategy for balancing industrial growth with environmental preservation. This study examines the impact of GSCM on firm performance, mediated by green innovation, in food and beverage SMEs in Cimahi City, Indonesia. SMEs in this sector significantly contribute to the regional economy while generating substantial waste, underlining the need for sustainable practices. The findings reveal that GSCM positively influences Green Innovation, with a strong effect, but has a weak and insignificant direct impact on firm performance. Green Innovation plays a significant role in improving firm performance, with a positive and significant effect. Additionally, Green Innovation acts as a mediator, partially influencing the relationship between GSCM and firm performance. These results underscore the importance of GSCM and Green Innovation in enhancing firm performance and promoting environmental sustainability in SMEs.

Tearing stable stationary ITER baseline operation in DIII-D

Abstract We present a tearing stable, stationary and reproducible operating solution for DIII-D plasmas characterized by the ITER baseline scenario normalized parameter set and shape. In these plasmas low differential rotation ( Δ f 1 , 2 ) between the core and edge is identified as the single root cause of the onset of the primary limiting instability, the 2,1 Neoclassical Tearing Mode (NTM), while a group of other examined parameters have a much weaker impact on the stability. Explanation is offered by drift kinetic simulations, which show a six-fold reduction in the NTM onset threshold due to diminished stabilizing ion polarization currents when the seed island drift frequency ceases in the local plasma frame. Based on the experimental observation and the explanation provided by the theory, a new discharge program is developed to sustain Δ f 1 , 2 by modifying the edge neoclassical potential through neutral gas fueling. This method enables stationary ITER baseline operation free of disruptive 2,1 tearing modes.

The effect of the broken window theory in dealing with the crisis

The intellectual aspect of the study is formed through the interaction of the two variables of the study (the shattered window theory, and the success of dealing with crises). The districts of Baghdad at the present time have been characterized by developing the educational process and avoiding crises, whether they are passive or not, and the educational aspect of those directorates, so the importance of the matter has increased Pushing the education directorates in Baghdad to provide knowledge, generate it, share it, find the appropriate site for it, and make it successful. The researcher used the applied study according to the analytical descriptive approach and applied it to a sample of general managers and their assistants, department managers and heads of divisions (on the directorates of the Baghdad governorate in the Karkh and Rusafa side, in the Ministry of Education, and the number of sample members reached (450) and (400) forms were retrieved from the forms The data was collected by means of a questionnaire, and a set of statistical methods were used to process the data, including (arithmetic mean, standard deviation, coefficient of variation) for the purpose of describing the sample, the simple linear correlation coefficient (Spearman) to test the correlation hypotheses, and simple linear regression to test the impact hypotheses. From the study, the researcher reached a set of conclusions, the most important of which is (the administration in the Baghdad education directorates did not give any importance to containing and limiting the damage, as it represents the best side and the directorate avoids crises coming to it from abroad, and it has the ability to contribute to the directorate’s success because it contains the crisis, This leads to weak roles and impact of damage containment and limitation, which is one of the causes of the crisis.

Factors affecting cash flow management activities of textile and garment enterprises in Vietnam

Purpose: This study shows the level of influence of factors on cash flow management activities of enterprises through survey and recovery analysis from data of 50 Vietnamese garment enterprises. Design/Methodology/Approach: The article uses two basic research methods including: qualitative and quantitative research. In which, the qualitative method is to synthesize research works related to the article, thereby determining the research hypothesis. The quantitative method is implemented on the basis of building a scale for 7 factors affecting cash flow management activities and surveyed and analyzed data from 50 textile and garment enterprises in Vietnam to test the published hypotheses. Findings: The results show that 5 out of 7 factors have an impact on cash flow management activities of listed textile and garment enterprises in Vietnam, including: sales policy (SP), inventory management policy (IMP), payment policy with suppliers (PPS), enterprise size (ES) and level of information technology application in cash flow management (LIC). Conclusion: In particular, sales policy is the strongest impact factor, the ability to apply information technology has the weakest impact, in particular, inventory management policy has a negative impact on cash flow management activities. Research Limitations/Implications: From the results of this research, the author suggested for Vietnamese textile and garment enterprises in cash flow management activities. Practical Implications: This research result is completely consistent with previous domestic and foreign studies. Contribution to Literature: The study provides necessary information to help Vietnamese textile and garment enterprises improve cash flow management in the coming time.

Barotropic Trends Through the Barents Sea Opening for the Period 1975–2021

AbstractWe analyze the output of a regional ocean model that comprises the North Atlantic and the Arctic Ocean for the period 1975–2021. We focus on the flow through the cross sections closing the Nordic Sea basin. The simulated flow at Barents Sea Opening (BSO) shows a clear positive trend. To understand the origin of this trend, we reconstruct the BSO flow based on wind time series over the Nordic Seas using deep learning. To explore potential links between the results from this reconstruction and the major atmospheric modes, we perform a suite of idealized experiments where the ocean model is forced with wind field anomalies that refer to known changes in the leading modes of atmospheric circulation over the North Atlantic and Arctic Oceans. Known changes in the major atmospheric wind patterns over the North Atlantic have a weak impact on the simulated BSO flow, and the sign is not consistent with the overall trend of the full simulation. The latter holds as well for the known temporal changes in the intensity of the Arctic dipole mode. The weak temporal changes in the Arctic oscillation are consistent with the trend in the BSO flow but could not explain its amplitude. Ultimately, we could not establish a clear link between the BSO flow trend and changes in the major atmospheric modes. We conclude that the atmospheric pattern responsible for the BSO flow trend does not project directly on the leading modes of atmospheric variability over the North Atlantic and the Arctic.

Household Sector Indebtedness and Its Impact on Financial Stability Indicators in Egypt

The research examines with studying the problematic relationship between the indebtedness of the family sector and financial stability by studying the facts provided by economic theory, research and studies, and then studying the case of Egypt by collecting and analyzing the facts and data related to the studied variables, and the problem of the research is to question the impact of the indebtedness of the family sector on financial stability in Egypt, and the hypothesis of the research is that the developments of financial globalization and financial openness, and by collecting and analyzing the facts Economic and related historical data, as well as the adoption of the inductive approach by making hypotheses among the studied relationships, and analyzing the relationship between variables .The research reached a set of conclusions, the most important of which is the weak impact of family sector indebtedness on financial stability due to the limited amount of bank financing for the family sector and the structural imbalance in the relationship between family spending and bank credit, and the weak capabilities of the private sector in accessing and employing finance , and the most prominent recommendations were the need to follow an economic policy to enhance the role of the family sector in economic growth by increasing the credit provided to the family sector to enhance economic growth According to the levels of household debt commensurate with the requirements of sustainable financial stability.

Investigating the spatiotemporal distribution of refractivity structure index in low-speed flow field by moiré deflectometry

Abstract Atmospheric optical turbulence is a significant restraint on free-space optical communication and atmospheric laser transmission, whose intensity is generally quantified by the refractivity structure index. In this paper, moiré deflectometry is applied to study the combined effects of thermal disturbance and flow speed on the spatiotemporal distribution of the refractivity structure index. Firstly, three sets of comparative experiments are conducted, and 3600 frames of moiré fringes are captured within an hour in each set. Then, the spatiotemporal distribution is obtained based on the theoretical relationship between the refractivity structure index and the phase information recorded by moiré fringes. Finally, its regularities under different experimental conditions are comparatively analyzed. The findings reveal that both thermal disturbance and flow speed will change the intensity of optical turbulence. And, although the latter has a much weaker impact than the former, their combined effects will increase the intensity by three orders of magnitude. In this process, the contribution of thermal disturbance accounts for more than 75%. In short, the related results could provide some insights for research on atmospheric optical detection and communication.

Incorporating Environmental, Social and Governance (ESG) Standards into Corporate Strategies for Success: A Case Study of a Group of American Companies

Success and growth are important goals to ensure survival, leadership, and sustainability of companies in the market. These goals require thoughtful strategic decisions that consider the company's impact on its environment and society besides balancing its profitability with social responsibility. This research aims to study how companies adopt ESG standards and incorporate them into strategic plans, and how that affects their stock performance in the financial market as criteria for companies' success. A sample of (45) USA companies adopting ESG standards was selected for this study. Simple linear regression analysis was used to show the relationship between ESG scores and indicators such as( Composite Rating, Relative Strength, and Earnings per Share Rating), according to the Investor's Business Daily (IBD) classification. The Composite Rating (Comp Rtg) reflects the overall performance level of the company’s stocks based on fundamental and technical analysis compared to other stocks in the same industry, the Relative Strength Rating (RS Rtg) compares the company's stock price performance against the overall market performance, while the Earnings Per Share Rating (EPS Rtg) reflects the profit that each share achieves, which significantly affects sustainable growth and success. The study results showed a significant impact of ESG on the Composite (Comp) Rating and a weak impact on the Relative Strength (RS) and Earnings Per Share (EPS) Ratings, which may be attributed to other market-related factors. These results can provide valuable insights for companies looking to improve their long-term value by investing in sustainable practices and attracting socially responsible investors, thus enhancing their performance and competitive advantage in the market.

The Impact of Selected Macroeconomic Variables on Agricultural Sector Performance in Nigeria

The study investigates the impact of selected macroeconomic variables on agricultural sector performance in Nigeria using time series data spanning from 1990 to 2021. The research adopts an ex-post facto design and utilizes data obtained from the Central Bank of Nigeria (CBN) Statistical Bulletin. Advanced statistical tools, including Auto Regressive Distributed Lag (ARDL) models, Descriptive Statistics, Augmented Dickey-Fuller Unit Root Tests, Breusch-Godfrey Serial Correlation Lagrange Multiplier (LM) Tests, and the Cumulative Sum of Recursive Residuals (CUSUM) Squares Test, were employed. The findings reveal that credit to the private sector has a positive but insignificant impact on agricultural sector performance. Broad money supply, monetary policy rate, and inflation rate exhibit negative and insignificant impacts, while banks' lending rates show a positive and significant impact. Jointly, the selected macroeconomic variables have a weak but significant impact on agricultural sector performance. The results highlight that while macroeconomic variables collectively influence the sector, the lending rate plays a more critical role in agricultural growth. Based on these findings, the study recommends improving access to agricultural credit through simplified loan processes and specialized financing products, enhancing monetary policy transmission to reduce financial intermediation frictions, and fostering a stable macroeconomic environment through effective inflation control and exchange rate management. Additionally, monetary policy adjustments should consider their potential effects on different sectors, including agriculture, to ensure sustainable credit growth and investment. Stabilizing inflation through sound fiscal and monetary policies is also emphasized to create a conducive environment for agricultural producers.

Metal Transfer Behavior and Molten Pool Dynamics in Cold Metal Transfer Pulse Advanced Additive Manufacturing of 7075 Aluminum Alloy.

Wire arc additive manufacturing (WAAM) with a special arc mode of cold metal transfer pulse advanced (CMT-PADV) is an ideal additive manufacturing process for fabricating aerospace components, primarily high-strength aluminum alloys, offering advantages such as high deposition rates and low cost. However, the numerical simulation of the CMT-PADV WAAM process has not been researched until now. In this study, we first developed a three-dimensional fluid dynamics model for the CMT-PADV WAAM of 7075 aluminum alloy, aiming at analyzing the droplet transition and molten pool flow. The results indicate that, under the CMT-PADV mode, droplet transition follows a mixed transition mode, combining short-circuiting and spray transition. The Direct Current Electrode Positive period of the arc accelerates droplet spray transition, significantly increasing molten pool flow. In contrast, the Direct Current Electrode Negative period of the arc predominantly features droplet short-circuiting transition with low heat input and a weak impact on the molten pool. The periodic switching of the current polarity of CMT-PADV mode results in periodic variations in molten pool size and volume, reducing heat input while maintaining high deposition quality. The revelation of this mechanism provides process-based guidance for low-defect, high-performance manufacturing of critical components.

Effects of Peatland Fires on Above-ground Carbon Stocks in Kepulauan Meranti Regency, Riau Province

Peat fires substantially alter ecosystem dynamics and carbon storage, making it essential to understand how fire-related components affect post-fire carbon stocks. This study aims to estimate the above-ground carbon stock on burned peatlands in Kepulauan Meranti Regency, Riau Province, and examine how fire recurrence, last fire occurrence, and burn severity influence the carbon stock using a modified regression model and remote sensing data. The normalized burn ratio index difference between post- and pre-fire was used to calculate burn severity. The continuous predictor variable was transformed using a natural logarithm to generate the best-fit model. The 2014 burned peatland stored the highest carbon, whereas the 2020 burned peatland was the lowest. The 2020 fire period was the most severe compared to the 2014 and 2018–2019 fires, although it had a smaller burned area. This study highlights that fire-related components significantly affect post-fire peatland above-ground carbon stocks, particularly last fire occurrence and burn severity. Meanwhile, fire recurrence had the weakest impact and correlation with above-ground carbon stock compared to other predictors, likely due to the brief intervals between fire events in 2018 and 2019, which may have restricted ecosystem recovery and limited carbon storage capacity.

TRANSFORMATIONAL LEADERSHIP AND INNOVATION IN THE MANUFACTURING SECTOR: A MODERATION MEDIATION MECHANISM OF ORGANISATIONAL CULTURE AND KNOWLEDGE SHARING

Objective: The objective of this study was to investigate the mediation effect of knowledge sharing on the relationship between transformational leadership and innovation. The moderating role of organisational culture was also tested on the relationship between transformational leadership and knowledge sharing. Theoretical Framework: This investigation is based on the transformational leadership theory. Transformational leaders inspire people to share knowledge and create a work environment that is supported by a conducive organisational culture. Method: Based on extensive literature review, a structured questionnaire was designed, and data were collected via Google forms from a total of 510 manufacturing sector employees based in three SADC region countries. Statistical analyses were done using SMART PLS 4. Results and Discussion: The study established that while transformational leadership had a significant positive impact on innovation, knowledge sharing partially mediated the relationship between the two variables. Organisational culture had a weak but positive impact on the relationship between transformational leadership and knowledge sharing.These results support prior research findings. Research Implications: Transformational Leadership and knowledge sharing were found to be positively associated with innovation, hence, theoretically, this study validates the antecedents of innovation in a manufacturing sector context. Practically, managers in the SADC manufacturing sector must exhibit attributes of transformational leadership whilst creating a conducive organisational culture that supports knowledge sharing. Originality/Value: This study contributes to the literature by proposing and validating a mediation-moderation model that supports the impact of transformational leadership on innovation. The relevance and value of this research is evidenced by an improvement in the quality of exportable products from the SADC manufacturing sector through the transformative efforts of organisational leaders.

Enhancing the Sustainable Performance of Public–Private Partnership Projects: The Buffering Effect of Environmental Uncertainty

The purpose of this study was to investigate the buffering (moderating) effect of environmental uncertainty (EU) on the relationship between the critical success factors (CSFs) of public–private partnership projects (PPPPs) and sustainable performance. A survey approach was adopted to collect primary data from construction industries that have signed an agreement with the public sector. The public sector includes federal and provincial government departments such as the National Highway Authority (NHA) and the Frontier Works Organization (FWO) for the construction of roads, and the private sector includes engineering companies registered with the Pakistan engineering council. The non-probability convenience sampling technique was used to select the sample, and the Krejcie and Morgan table was used to calculate the sample size. A total of 500 questionnaires were distributed but 394 completed questionnaires were used in the analysis of the data, yielding a response rate of 78.8%. Confirmatory factor analysis was conducted to check the reliability and validity of the scales; the findings revealed that the scales met the threshold, and all the factor loadings, average variance extracted, composite reliability, Cronbach alpha, and discriminant validities met the cut-off level. Hence, the questionnaires were found to be reliable and valid. The results revealed that environmental uncertainty significantly moderates the CSFs (technical, procurement, and economic factors) of PPPs and the sustainable performance of PPPPs. Furthermore, the interaction terms of all moderating effects revealed negative beta values; this implies that a low level of uncertainty results in better economic performance, better technical and procurement factors, and highly sustainable performance. It is concluded from the findings that if EU is high, then the sustainability of PPPPs is low; moreover, fewer economic resources and no technical support and procurement also have a weak impact on enhancing sustainable performance. On the contrary, if EU is low, there is a high level of sustainability in PPPPs.

Analysis of Correlation of Factors Influencing the Strategy of Systemically Managed Organizations – Contextual Approach

The aim of the article is to present the results of a correlation analysis of factors influencing the strategy of systemically managed organizations. Due to a recognized gap concerning the lack of context analyses in enterprises with an implemented and maintained management system, the article primarily addresses this issue. The author employed the case study research method. The SWOT/TOWS method was used in the analysis of research results. Based on the analysis, a competitive strategy was determined, allowing for the use of identified opportunities conducive to the development of the examined company while minimizing the impact of weaknesses on the level of functioning of the organization. Based on the research results, it can be concluded that the implementation of the strategy should result in an increase in the pro-development potential of the company, focused on fulfilling the assumptions of the established standard in the scope of safety and the quality of health and life of employees and other interested parties. It is important to note that maintaining the management system in an unchanged and uncontrolled form can result in its obsolescence and diminished effectiveness, ultimately hindering the achievement of the enterprise’s strategic objectives. The article highlights the importance of the need for dynamically adapting strategies to the changing context of a systemically managed organization’s operations.

Study on the Dynamic Response of the Hull Beam Model under the Combined Action of Wave Loading and Impact Loading

Abstract This paper aims to conduct experimental research on the dynamic response of hull structures under the combined action of wave loads and impact loads. Using an equivalent hull girder model as the research object, multiple sets of regular wave and impact load physical model tests were carried out. The test results show that under the combined action of wave-impact loads, the acceleration measurement points on the hull girder are mainly dominated by the dynamic response caused by the impact load at the moment of impact load application. Subsequently, within the wave period, the dynamic response caused by the impact load gradually decreases, eventually returning to the dynamic response mainly caused by the wave load. A simplified theoretical model of the hull girder was established, and the accuracy of the simplified theoretical model of the hull girder was verified by comparing the test results. The differential equations of the hull girder under the combined action of simplified wave loads and weak impact loads were established, and the accuracy of the simplified theoretical model of the hull girder was verified by comparing the test results. The research shows that under the combined action of wave-impact loads, the dynamic response of the hull structure cannot be simply superimposed by treating the dynamic responses of the two loads separately.

A STUDY ON THE IMPACT OF CROSS-BORDER E-COMMERCE CONSUMERS' PERCEPTION OF LOGISTICS SERVICE FAIRNESS ON THEIR SATISFACTION AND WORD-OF-MOUTH COMMUNICATION BEHAVIOR

This study explores the impact of fairness in cross-border e-commerce logistics services on Thai consumers' satisfaction and positive word-of-mouth communication. Based on the service fairness theory, the logistics service fairness is divided into three dimensions: distributive fairness, procedural fairness, and interactive fairness. Through a questionnaire survey of 507 Thai cross-border e-commerce consumers, the following conclusions were drawn using the multivariate regression analysis method: 1) All three fairness dimensions have a significant positive impact on consumer satisfaction and positive word-of-mouth communication; 2) Interactional fairness has the strongest impact, followed by procedural fairness with distributive fairness having the weakest impact; 3) The three dimensions jointly explain 42.3% of the variance in consumer satisfaction and 38.9% of the variance in positive word-of-mouth communication. The study expands the application of service fairness theory in the field of cross-border e-commerce logistics and verifies its applicability in cross-cultural contexts. The research results provide practical guidance for cross-border e-commerce companies to optimize logistics service strategies, improve Thai consumer satisfaction, and promote positive word-of-mouth communication.