Performance Analysis Method Research Articles

Mechanical performance analysis method for ribbed H-section aluminum alloy members with initial curvature and torsion angle

In this study, an experimental investigation was conducted on the axial compression performance of ribbed H-section aluminum alloy members with initial curvature and torsion angle under varying boundary conditions, including one end hinged with the other rigidly connected, and both ends rigidly connected. Ultimate bearing capacity and failure modes were identified under real loads and subsequently compared with previous findings from our research group on members with hinged ends. To account for initial imperfections introduced during processing and transportation, 3D scanning technology was utilized to capture the precise geometrical dimensions, constructing an accurate numerical simulation model. The experimental results were corroborated with numerical simulations, leading to the proposal of an analytical method for members with initial curvature and torsion angle. Furthermore, extensive parametric analysis elucidated the impact of initial curvature, torsion angle, and slenderness ratio on the ultimate bearing capacity, culminating in the formulation of the stability factor and calculated length factor based on numerical outcomes. The study discovered significant variances in bearing capacity under different boundary conditions, with one-end hinged and one-section rigidly connected, and two-end rigidly connected conditions exhibiting 1.4 and 2.1 times the capacity of the hinged-at-both-ends scenario. Under different boundary conditions, the axial compression members were subjected to flexural-torsional buckling failure. Moreover, when the ultimate bearing capacity was reached, the lower flange of the member and the web near the lower flange appeared obvious buckling phenomenon. The numerical analysis aligned well with experimental data, validating the simulation method's reliability and revealing the stress distribution and evolution during member failure. These findings offer vital theoretical insights and technical support for engineering design and practical applications.

Proposed Improvement of Trans Semanggi Suroboyo Services Using IPA and QFD Methods

The high intensity of private vehicle usage has led to uncontrolled road congestion. To encourage residents to switch to public transportation, the Surabaya City Government introduced Trans Semanggi Suroboyo. Trans Semanggi Suroboyo experienced a decrease in passengers in 2023, with a decline of 324,711 passengers. Based on a preliminary survey with direct interviews conducted with 35 Trans Semanggi Suroboyo passengers, frequent complaints were related to service and facilities. Therefore, it is important to analyze and propose improvements to the services of Trans Semanggi Suroboyo as public transportation in Surabaya. To enhance the quality of services and facilities, it is essential to identify and evaluate passenger perceptions using service quality dimensions based on the Decree of the Director General of Land Transportation Number SK.5923/AJ.005/DRJD/2016. The most important service quality priorities for passengers are measured using the Importance Performance Analysis (IPA) method. This research identified 9 critical attributes that require improvement. Subsequently, a service quality improvement design was developed using the Quality Function Deployment (QFD) approach through the House of Quality (HoQ) matrix, resulting in 5 priority technical responses. Based on these findings, a plan for improving the service and facilities of the Trans Semanggi Suroboyo bus was proposed to maintain the quality of public transportation services.

Quality Analysis Of Seameo Recfon Website Using The Webqual Method

his study aims to analyze and measure the quality of the SEAMEO RECFON website. The method used in this research is the Webqual method, which is a method or technique for measuring website quality based on end user perceptions which is used as the main reference with indicators of usability, information quality, and service interaction and the Importance Performance Analysis method. Data collection was carried out using a questionnaire of 50 questionnaires. The results showed that the level of user satisfaction with functionality has been achieved, while the level of user satisfaction with information quality has not been achieved, and the quality-of-service interaction has not been achieved. Based on the assessment of the three measurement dimensions, the usability dimension has a value of (0.245), the service interaction dimension has a difference or gap value of - (0.39) and the information dimension has a difference or gap value of - (0.26). Based on this, it can be concluded that the actual perception of quality has not been able to meet the ideal quality desired by SEAMEO RECFON website users, especially from quality attributes related to information on the website.

Multi-scale modeling and mechanical performance analysis of finger seals with plain woven C/C composite

The application of carbon fibers reinforced carbon matrix (C/C) composite can solve the local wear of metallic finger seals effectively. However, the performance of C/C composite finger seal is complex and variable, which further decreases the sealing performance and life. Therefore, a method of multi-scale modeling and mechanical performance analysis for plain woven C/C composite finger seals was conducted. The circumferential finger beams of C/C composite were modeled by multi-scale structural analysis and weaving simulation. The radial static and dynamic stiffness characteristics of finger beams were investigated. The results showed that the radial static stiffness of the finger beam with three layers was about 3 times that with single layer. The radial stiffness of circumferential finger beams presented a periodic distribution pattern with a period of 90°. The radial dynamic stiffness of C/C composite finger beams increased with the excitation displacement amplitude and rotor speed. But the magnitude and fluctuation degree of dynamic stiffness were greater than those of static stiffness. A large difference in radial stiffness will lead to local wear and hysteretic leakage. This study lays a foundation for the analysis and optimization of the hysteresis and wear characteristics of C/C composite finger seals.

0D-1D coupled method for performance design and analysis of adaptive cycle engine - Modeling, simulation and validation

0D-1D coupled method for performance design and analysis of adaptive cycle engine - Modeling, simulation and validation

Building the right employee value proposition to retain millennial talents: A case study at a national bank in Indonesia

Bank ABC are dominated by the millennial generation, which makes up 65% of all employees. During the 2020-2022 period, there was an increase in the number of employees who resigned, most of whom were the millennial generation and had good performance. Meanwhile, in the next 3-5 years the millennial generation is projected to occupy strategic positions. Therefore, this study aims to develop employee value proposition (EVP) development strategy in the context of millennial talent employees’ retention. The research was conducted through a survey using Pawar and Charak's EVP Priority Model dimension guide, equipped with additional dimensions obtained from interviews with millennial employees with high potential and performance. The survey was filled by 366 millennial talent employees. The survey results were processed and analysed using the Importance Performance Analysis (IPA) method. Results related to priority EVP attributes for development (quadrant 1 IPA results) were obtained, namely: Career development, performance appraisal, workload, work-life balance, technological innovation, annual leave and performance-based remuneration. Based on the findings obtained, a model has been built which consists of three priority areas for EVP development, namely Leader's Future Development, Design of Organization, and Remuneration for Human Capital Sustainability (abbreviated to LDR – Leadership Development Remuneration Model), with four strategic program designs consisting of: (1) performance assessments that prioritize the principle of fairness,(2) acceleration of levels digital-based career and competency development, (3) workload analysis and job design that supports the future of work, and (4) development of competitive compensation with equitable principles.

Design optimization and off-design performance analysis of one-dimensional supercritical CO2 Brayton cycle

Supercritical carbon dioxide (SCO2) recompression Brayton cycle (RBC) is an encouraging technology for thermal power conversion and heat harvest for a wide range of heat sources due to its high-efficiency, low auxiliary power consumption, and compact size. However, most studies on its design and off-design performance analysis have been limited to the simple zero-dimensional component models without considering aerothermodynamics and ambient conditions. In this study, we developed a set of fully one-dimensional components models for SCO2 compressors, turbines, and heat exchangers, and, then, applied them to the multi-objective design optimization of a SCO2 cycle targeting a 50 MW net power output. The cycle off-design performance analysis methods and the control strategies were developed to countermeasure the performance degradation against the varying cooling water temperatures and part loads. The multi-objective cycle design optimization demonstrates that the cycle thermal efficiency and total product unit cost can be 0.476 and 11.652$/GJ, respectively, for the 50 MW SCO2 RBC cycle. The choke margin of the main compressor is 0.136 less than that of the re-compressor, and condensation can lead to a sharp decline in efficiency under high-flow conditions, causing the earlier onset of choking. The off-design performance analysis shows that the turbine inlet pressure control improves cycle efficiency below the design point of 317 K but does otherwise above the point. In contrast, inventory control strategies can maintain stable cycle efficiency and achieve adjustable net power output between 10 % and 110 %. The findings have the potential to advance further the commercial application of SCO2 cycles in high-temperature thermal energy systems.

Stakeholder Analysis of Indonesia's Trade the Regional Comprehensive Economic Partnership (RCEP) Actor Non-ASEAN

This study examines Indonesia’s trade relations with non-ASEAN member countries under the Regional Comprehensive Economic Partnership (RCEP). The RCEP, signed in 2020, presents Indonesia with significant opportunities to expand market access, particularly with key partners like China, Japan, South Korea, Australia, and New Zealand. However, challenges persist, particularly in terms of trade imbalances and competitive pressures. The research employs a mixed-methods approach, combining quantitative data from trade flow statistics and tariff reductions with qualitative insights from interviews and focus group discussions with key stakeholders. The Importance Performance Analysis (IPA) method was applied to assess the effectiveness of RCEP provisions. Results show that while Indonesia benefits from improved market access, significant trade deficits remain, especially with China and Australia. Stakeholders, including government agencies and private sector exporters, play pivotal roles in mitigating these challenges by addressing non-tariff barriers and enhancing trade facilitation. In conclusion, Indonesia must strategically leverage the RCEP framework to address trade imbalances and improve export competitiveness. Policy recommendations include enhancing stakeholder collaboration, improving infrastructure, and increasing awareness among small and medium enterprises (SMEs) to fully utilize RCEP benefits. These efforts will ensure Indonesia remains competitive in global trade.

Analysis of Service Quality Improvement Using Service Quality (SERVQUAL) and Importance Performance Analysis (IPA) Methods (Case Study at PDAM Banggai Regency)

PDAM Kab.Banggai is a service company that has the aim of meeting the needs in the field of clean water must provide the best service. The purpose of this research is to analyze service quality based on customer satisfaction and find out the factors that affect service quality to get a solution to the causes of problems based on service quality. This research will use the servqual method to measure service quality with the level of perceptions and expectations of consumers in the services provided by service providers. Furthermore, the Importance Performance Analysis (IPA) method is used in measuring the level of importance and performance so that the company can find out the attributes that need to be improved and maintained in service based on a Cartesian diagram and will produce a basis for customer satisfaction. After that, the Fishbone Diagram is used to analyze the consequences by finding and describing the factors that cause the existing problems. Then given the proposed improvements and submitted PDAM to be followed up by PDAM Kab.Banggai. The results of the Service Quality analysis of the quality of service of PDAM Kab. Banggai obtained a negative Gap in the Reliability dimension at attribute B5 (-1.200), in the Responsiveness dimension obtained a negative Gap at attribute C1 (-1.140), at attribute C2 with a negative Gap (- 1.120) and in the Assurance dimension with a negative Gap (-0.560). The results of the analysis using Importance Performance Analysis obtained 4 attributes that are among the top priorities for improvement, namely the attributes contained in quadrant I. The four attributes that are the top priorities for improvement are the ease with which customers can submit complaints online to the PDAM, employees are responsive when answering complaints from customers through online media such as whatsapp, officers contact customers when they cannot fulfill the specified repair promise and the use of PDAM services Kab. Banggai is guaranteed to be safe when making payment transactions. The proposed improvements given to PDAM Kab. Banggai are Attribute D2, namely conducting a re- check before making payment bills to customers, collaborating with third parties such as banks and outlets (indomaret, alfamidi, etc.) and making payment applications directly linked to PDAM accounts so that there is no manipulation during the payment process. Attribute C2 is instilling a sense of responsibility in officers and openness to customers to contact customers as soon as possible if something happens or cannot fulfill the specified repair promise, the need to make SOPs so that they have standard provisions for contacting customers if they cannot fulfill repair promises and provide facilities to contact customers. Attribute C1, namely recruiting Customer Service and implementing a 24-hour work shift system to be available if there are complaints via messages or calls, implementing online complaint services for 24 hours to be responsive to answering customer complaints and providing social media accounts that are always updated to provide information about PDAM and responsive when there are complaints from customers online. Attribute B5, namely implementing a work shift system for officers who are available when there are complaints via messages or calls, implementing online complaint services through social media and providing media for customers to submit complaints online such as providing PDAM contact numbers that are always active 24 hours. For further research, it is hoped that it will be able to research to implement the proposed improvements provided and analyze the quality of service after implementing the proposed improvements provided by the author so that the effectiveness of the services that have been implemented can be known.

A controllability method on the social Internet of Things (SIoT) network

In recent years, one type of complex network called the Social Internet of Things (SIoT) has attracted the attention of researchers. Controllability is one of the important problems in complex networks and it has essential applications in social, biological, and technical networks. Applying this problem can also play an important role in the control of social smart cities, but it has not yet been defined as a specific problem on SIoT, and no solution has been provided for it. This paper addresses the controllability problem of the temporal SIoT network. In this regard, first, a definition for the temporal SIoT network is provided. Then, the unique relationships of this network are defined and modeled formally. In the following, the Controllability problem is applied to the temporal SIoT network (CSIoT) to identify the Minimum Driver nodes Set (MDS). Then proposed CSIoT is compared with the state-of-the-art methods for performance analysis. In the obtained results, the heterogeneity (different types, brands, and models) has been investigated. Also, 69.80 % of the SIoT sub-graphs nodes have been identified as critical driver nodes in 152 different sets. The proposed controllability deals with network control in a distributed manner.

SOME FEATURES OF PERFORMANCE TECHNIQUES ON THE KAZAKH PRIMA KOBYZ

The improvement and advancement of performance on the four-string prima kobyz have contributed to the development of technical and bowing capabilities in musicians, such as increased agility in the fingers of the left hand. Pieces that were performed exclusively by students of higher educational institutions 50 years ago are now part of the curriculum in specialized music schools. In this context, the aim of this article is to describe the complex performance techniques of the modern prima kobyz and offer recommendations for overcoming the associated challenges. The tasks derived from this aim include exploring the formation of performance art and classifying the bowing techniques found in prima kobyz repertoire. The relevance of the study is underscored by the increasing level of performance on this instrument, the need for a classification system for bowing techniques, and the analysis of general trends in overcoming technical difficulties in playing the instrument. The scientific and methodological significance of this research lies in its practical application, which relates to both the educational process and performance practice. The practical significance of the study’s findings is that they can enhance the content of courses such as 'History of Performing Arts' and 'Methods of Teaching Special Disciplines.' The article applies performance analysis, content analysis, and qualitative methods to develop a grounded theory regarding performance issues with the prima kobyz. The prima kobyz has gradually lost many of the traditional kobyz's characteristic features (such as the open body, leather structure, and inclined neck) and has become a new national instrument. This transformation is due to its structural similarity to the violin, the incorporation of violin techniques, and the establishment of European academic principles in modern prima kobyz performance techniques.

Performance analysis and design method of strengthening beam-column welded connections against progressive collapse

To address the insufficient collapse resistance of the beam-column welded connection (BWC), this study proposes a strengthening beam-column welded connection with truss elements (BWCTE). A static test on a BWCTE specimen with a composite slab was conducted to investigate its failure pattern, final deflection, and the evolution of axial force, bending moment, and collapse resistance. The results indicate that the addition of truss elements increases the peak load and corresponding deformation of BWCTE by 108.6 % and 27.3 %, respectively, compared to BWC. Moreover, the axial force in the composite beam of the BWCTE specimen achieved the yield axial force, facilitating the complete development of catenary action and optimizing beam performance. Subsequently, primary parameters of the truss element were analyzed using refined numerical models. It is recommended that the projected length of the inside leaning limb is within 0.5 to 0.7 times the height of the steel beam, and the thickness of each limb is within 0.6 to 1.2 times the thickness of the beam flange. Then, the working mechanism of BWCTE was explored through theoretical analysis. The resistance process of BWCTE can be divided into elastic, elastic-plastic, plastic, transition, and catenary stages. The loading and deformation synergies between truss elements and composite beams enable the formation of double plastic zones and double strengthening zones at the beam root, effectively delaying the rupture of the stretched beam flange. Finally, a design method for BWCTE is proposed according to theoretical and numerical analysis.

Rethinking Cultural Ecosystem Services in Urban Forest Parks: An Analysis of Citizens’ Physical Activities Based on Social Media Data

Urban forest parks play a vital role in promoting physical activities (PAs) and providing cultural ecosystem services (CESs) that enhance citizens’ well-being. This study aims to reevaluate CESs by focusing on the physical activity experiences of park visitors to optimize park management and enhance citizen satisfaction. This study utilized social media data and employed natural language processing techniques and text analysis tools to examine experiences related to physical activities in Beijing Olympic Forest Park, Xishan Forest Park, and Beigong Forest Park. A specialized sports activity dictionary was developed to filter and analyze comments related to PA, emphasizing the impact of natural environments on enjoyment and participation in PA. The importance–performance analysis (IPA) method was used to assess the service characteristics of each park. The findings reveal that urban forest parks are highly valued by citizens, particularly for their natural landscapes, leisure activities, and the emotional fulfillment derived from PA, with 82.58% of comments expressing positive sentiments. Notably, appreciation for natural landscapes was exceptionally high, as evidenced by the frequent mentions of key terms such as ‘scenery’ (mentioned 2871 times), ‘autumn’ (mentioned 2314 times), and ‘forest’ (mentioned 1439 times), which significantly influence park usage. However, 17.11% of the reviews highlighted dissatisfaction, primarily with the management of facilities and services during sports and cultural activities. These insights underscore the need for performance improvements in ecological environments and sports facilities. This study provides a novel perspective on assessing and optimizing urban forest parks’ functions, particularly in supporting active physical engagement. The rich CESs offered by these parks enhance physical activity experiences and overall satisfaction. The findings offer strategic insights for park managers to better meet citizens’ needs and improve park functionality.

A Novel Lock-In Amplification-Based Frequency Component Extraction Method for Performance Analysis and Power Monitoring of Grid-Connected Systems

A Novel Lock-In Amplification-Based Frequency Component Extraction Method for Performance Analysis and Power Monitoring of Grid-Connected Systems

Analysis of The Level of Patient Satisfaction with Pharmaceutical Services In Xyz Regional Hospital Bandung Indonesia

Abstract Hospitals are health facilities that provide various services, one of which is pharmaceutical services. Pharmaceutical services are an activity organized to maintain and improve the health of patients. Patient satisfaction is an important indicator in achieving conformity with expectations in health services in hospitals. The level of patient satisfaction can be seen from good service. The purpose of this study is to determine and evaluate the level of patient satisfaction with pharmaceutical services at the XYZ regional hospital in Bandung, West Java. In this study, the application used in SPSS to process data with the methods used, namely the Importance Performance Analysis (IPA) method and the Customer Satisfaction Index (CSI). This method is used to identify the level of importance of each service attribute and the priority of improvements that must be made by a hospital to determine the level of patient satisfaction. IPA analysis shows that the point included in quadrant I (high importance and low satisfaction) is R6, namely complete available drugs but in reality, the drugs are not available so this statement is considered important by patients because it has facts that are not yet appropriate and need to further improve their performance so that the service is more satisfying. Meanwhile, based on the results of the CSI analysis, it is known that the overall value of the respondent's satisfaction level for all attributes is 83.9%. So based on the satisfaction index patients are satisfied with pharmaceutical services at the XYZ Bandung Regional Hospital. Keyword: Patient Satisfaction, IPA, CSI, Hospital

ANALISIS KUALITAS PELAYANAN SISTEM X-RAY PADA PT PELINDO CABANG BENOA

This study aims to assess the service quality of the X-ray system at Benoa Port and provide recommendations for improving service quality at Benoa Port. The analysis methods used are the Service Quality (Servqual) method to identify gaps between the perceptions and expectations of passengers regarding service quality at Benoa Port and the Importance Performance Analysis (IPA) method to determine service improvement priorities. The sample of this study consisted of 96 cruise passengers in 2024. The result of the research using the servqual method indicate that there are gaps in all dimensions. The highest gap is in the tangible dimension with -0,49 and the lowest gap is in the assurance dimension with a gap of -0,24. Overall the average perception score is 3,80 and the average expectation score is 4,19, resulting in a gap of -0,39 and an average Q score of 0,91 indicating that the service quality provided almost meets the passengers expectations but is not yet perfect. The analysis result using Importance Performance Analysis (IPA) methode show a conformity rate (TKi) between importance and performance of 93,65%, indicating that the quality of the X-ray service system at Benoa Port meets the passengers expectations but still requires improvements. Based on the Cartesian Diagram, there are 5 attributes located in quadrant I, which means that improvements are necessary, consisting of the dimensions of tangibles, responsiveness, and empathy

Application of Importance Performance Analysis Method for Service Identification in the Learning Process

Application of Importance Performance Analysis Method for Service Identification in the Learning Process

Performance analysis method on the ship with waterjet-propeller hybrid propulsion system: A case study in model scale

The waterjet-propeller hybrid propulsion (WPHP) system shows remarkable potential for comprehensive performance enhancement in a wide speed range. As it consists of two types of significantly different marine propulsors, its performance analysis faces challenges. This paper first illustrates the performance analysis method on a ship model with WPHP system, where the momentum flux method is adopted for the analysis on waterjet subsystem while the classical propulsion theory is used for the propeller subsystem. The proposed method enables detailed investigations on overall performance of WPHP-hull system and respective performances of waterjet and propeller, respectively. As for the case studied, its overall propulsion efficiency is 58.77% at ship design speed in model-scale, where the corresponding propulsion efficiencies of waterjet and propeller subsystems are 59.19% and 56%. The waterjet affords 87.39% load of the bare hull resistance and provides 89.40% net thrust to force the self-propelled hull forward. The waterjet performance is less influenced by the flow-field interference between waterjet and propeller. However, the impact of waterjet intake is relatively significant on accelerating the propeller intake, where propulsion efficiency of propeller decreases. Moreover, high resistance increment fraction of the case is a point that should be further improved to enhance overall performance.

Analysis of User Satisfaction Index of Clean Water Providers by PDAM in Bireuen Regency

PDAM Tirta Krueng Peusangan is a Regional Drinking Water Company located in Bireuen Regency which has duties and obligations in the process of organizing, processing, providing, and providing clean water services which are required to always be able to make improvements in the field of service as an effort to provide satisfaction to its customers. Based on the 2021 BUMD performance report, it was found that PDAM Krueng Peusangan was in the healthy category, but the 2014 RISPAM stated that there were still many water leaks. Therefore the purpose of this study was to analyze the level of customer satisfaction with the provision of clean water provided by PDAM Tirta Krueng Peusangan. The research was conducted by distributing questionnaires to respondents who are customers of PDAM Tirta Krueng Peusangan, Bireuen Regency. Customer satisfaction was assessed using the Importance Performance Analysis (IPA) method. The results obtained are that customers are very satisfied with the services provided with a percentage of 93%.

Optimized Decisions for Smart Tourism Destinations: A Cross-Generational Perspective Using an Improved Importance–Performance Analysis

Our study introduces an enhanced version of the Importance–Performance Analysis (IPA) method, a powerful tool that can be applied across various domains. This method plays a crucial role in our research, aiding in making well-informed decisions about smart tourism destination attributes. We achieved this by evaluating how 911 consumers from four different generations (Baby Boomers, Generation X, Millennials, and Generation Z) rated these attributes based on their most recent tourist destination visit. Unlike traditional methods that often rely on subjective opinions or complex statistical models, the Improved IPA (IIPA) method offers a clear approach to decision-making. It enables decision-makers to focus on the most crucial attributes that drive consumer interest, thereby optimizing resource allocation and marketing efforts. Specifically, to remain competitive, decision-makers for smart tourist destinations should focus on queuing-time forecast and applications, websites, and content accessible for travelers with disabilities for Baby Boomers; e-complaint handling for Generation X; smart emergency response system for Millennials; and tourist-flow forecast, real-time traffic broadcast, electronic-entrance guard systems, and accessible data about physical design features of accommodation, restaurants, and tourist attractions for Generation Z. Theoretically, this study advances the research on managerial decision-making by demonstrating the effectiveness of the IIPA as a clear and straightforward method for making optimal decisions about product or service attributes. In practice, the study provides decision-makers with valuable insights into the importance of different categories of smart attributes in shaping the overall holiday experience at a tourist destination for Baby Boomers, Generation X, Millennials, and Generation Z tourism consumers.