Work Equipment Research Articles

Penataan Penjadwalan Preventive Maintenance Semua Mesin Milling Wheat Menggunakan Metode TPM (Total Productive Maintenance)

PT X is a factory that processes wheat into flour with roll mill as the main equipment. The wheat used is a blend of Indian wheat and Australian wheat. Indian wheat has a hard texture that can cause the roll grinding to become damaged or dull, increased working amperes,bearing jams, broken belts and motor overload which causes downtime. When a machine or component breaks down, the production process in the company will be disrupted and may come to a halt, so the target is not achieved and endangers to the company. To keep production machines and equipment working, maintenance processes are carried out properly and regularly. Additionally, the company can implement preventive maintenance steps to prevent and reduce machine downtime. Preventive maintenance is a planned maintenance strategy to prevent potential breakdowns. To reduce the high machine downtime, preventive maintenance is solution . The method chosen in this research is Total productive Maintenance. Based on research results, the overall equipment effectiveness (OEE) values were 85.8% in January, 87.18% in May, 86.69% in June, 85.25% in November, and 85.51% in December. The OEE values that did not meet the standard occurred in February (81.92%), March (81.34%), April (84.73%), July (83.77%), August (79.03%), September (77.05%), and October (81.72%). The biggest factor that causing losses of overall equipment effectiveness is caused by the high value of the six big losses, particularly the reduced speed losses, which stand at 9%.

A New Strategy: Remaining Useful Life Prediction of Wind Power Bearings Based on Deep Learning under Data Missing Conditions

With its formidable nonlinear mapping capabilities, deep learning has been widely applied in bearing remaining useful life (RUL) prediction. Given that equipment in actual work is subject to numerous disturbances, the collected data tends to exhibit random missing values. Furthermore, due to the dynamic nature of wind turbine environments, LSTM models relying on manually set parameters exhibit certain limitations. Considering these factors can lead to issues with the accuracy of predictive models when forecasting the remaining useful life (RUL) of wind turbine bearings. In light of this issue, a novel strategy for predicting the remaining life of wind turbine bearings under data scarcity conditions is proposed. Firstly, the average similarity (AS) is introduced to reconstruct the discriminator of the Generative Adversarial Imputation Nets (GAIN), and the adversarial process between the generative module and the discriminant is strengthened. Based on this, the dung beetle algorithm (DBO) is used to optimize multiple parameters of the long-term and short-term memory network (LSTM), and the complete data after filling is used as the input data of the optimized LSTM to realize the prediction of the remaining life of the wind power bearing. The effectiveness of the proposed method is verified by the full-life data test of bearings. The results show that, under the condition of missing data, the new strategy of AS-GAIN-LSTM is used to predict the RUL of wind turbine bearings, which has a more stable prediction performance.

Hearing Threshold Levels among Clothes Convection Industry Workers in Klaten, Central Java, Indonesia

Introduction: Noise-induced hearing loss is a condition that develops gradually and often goes unnoticed due to the absence of observable symptoms. Noise-induced hearing loss is usually detected after effects on hearing ability, difficulty understanding speech, and communication disorders. This study aims to determine the prevalence of hearing threshold decline in workers in the clothes convection industry in Klaten, Central Java, Indonesia. Methods: A cross-sectional study, with 21 respondents, was conducted from April to June 2023. Data were collected through interviews, measurement of noise levels in the workplace, otoscopic and audiometric examinations, and research questionnaires. Results: Most study respondents were female (85.7%) and workers who had worked for 11-20 years (66.7%). The main results showed that the prevalence of decreasing hearing threshold among workers in this study was 33.3%. Conclusion: The prevalence of hearing threshold decline was correlated with length of work and use of ear protection equipment.

Entry-Level Occupational Therapy Student Volunteer Activities During COVID-19 and Beliefs about Practitioner Roles in Crisis Management

Background: Due to the global novel coronavirus disease 2019 (COVID-19) pandemic, many students in entry-level occupational therapy programs faced changes to their daily roles, habits, and routines. To understand beliefs about OT practitioner roles in a public health crisis, a cross-sectional study was designed to understand occupational therapy students (OTS) and occupational therapy assistant students (OTAS) volunteer activities during the COVID-19 pandemic. Methods: A survey was developed and distributed in April 2020, and closed after five weeks. Quantitative data was analyzed in Statistical Package for Social Sciences (Version 27) and open response data was categorized in Microsoft Excel. Results: Respondents included students from entry-level OT/OTA accredited programs such as occupational therapy doctorate, entry level master’s, bachelor’s to master’s and occupational therapy assistant (n=853, 2.8% of OTS/OTAS population). Nearly all respondents endorsed that OT practitioners have at least one role during a crisis (n=851, 99.8%) and after a crisis (n=848, 99.4%) like COVID-19. A minority of students volunteered in response to COVID-19 (n=60, 7.0%). Volunteer activities addressed clinical work, food insecurity, loneliness, social justice, healthcare workers, COVID-19 transmission, and personal protective equipment. Inspirations for volunteering included altruism, justice, personal responsibility, changes to routines, calls to action, and fulfilling obligations. Discussion: It is hoped that this study serves as a springboard for future research related to the OTS/OTAS response to COVID-19. Educators can prepare students for future public health emergencies by exposing them to information regarding OT’s role in disaster management.

A temporal partial domain adaptation network for transferable prognostics across working conditions with insufficient data

Variations in equipment working conditions cause distribution drifts in condition monitoring data, thus impeding the accuracy of remaining useful life (RUL) prediction. Although numerous transfer learning methods have been developed for cross-domain prognostics, it is still challenging to collect enough target domain data to meet training demands because of economic and safety concerns. Therefore, a temporal partial domain adaptation network (TPDAN) is proposed for transferable prognostics across working conditions without run-to-failure data in the target domain. Firstly, the domain discrepancy is appropriately measured by a stage-weighted maximum mean discrepancy (SW-MMD), allowing for the inconsistency of the RUL distribution of available data between domains. Secondly, the ranking-based feature regularization is developed to align the relative position of samples in the feature space and the label space. It facilitates the exploitation of temporal information inherent in the samples and restrains the destruction of the degradation properties of features. By performing domain adaptation based on the above tools, domain-invariant and degradation-aware features can be extracted by the TPDAN to provide reliable knowledge transfer across working conditions. The effectiveness of TPDAN has been validated, and experimental results demonstrate the compelling transferable RUL prediction performance even when run-to-failure data is unavailable in the target domain.

Identifying Critical Tasks in the Kadiri University 4 Floor Building Construction Project Using the Critical Path Method

This study aims to identify critical tasks in the construction of a 4-floor building at Kadiri University using the Critical Path Method (CPM). The project is planned to be completed within 43 weeks, from October 2023 to August 2024, with a budget of IDR 20,551,534,000. Data collection involved direct site visits for primary data and secondary data from project documentation, including the Cost Budget Plan (RAB) and project schedule. Using Microsoft Project software, a project network was mapped, and CPM analysis was performed to identify the critical path. The analysis revealed that several tasks, such as site cleaning, demolition, temporary project fencing, heavy equipment work, geotechnical work, and various structural works from the 1st to the 5th floors, are on the critical path. These tasks have zero slack time, indicating that any delays will directly impact the overall project timeline. Identifying the critical path is crucial for project managers to prioritize resources and efforts on these tasks to ensure the project stays on schedule. This study underscores the significance of CPM in project management for timely completion and effective resource allocation, providing valuable insights for managing similar construction projects.

Development of the Wind Direction Indicator Display as a Learning Media for Visual Landing Aid Systems

In this study, we designed a wind direction indicator display as a learning medium to help cadets understand how the equipment works. Wind direction indicators are used as a navigation tool for pilots to determine landing direction on airport runways. This study was conducted at the Palembang Aviation Polytechnic using mixed methods, namely research and development and quantitative. The object of the research is cadets of the airport engineering technology study program. Determining whether there are differences in the results or not, by using paired t test. The study results show that the cadets are very enthusiastic in learning and developing these tools, as well as increasing their knowledge and competence in the field of visual landing aids at airports. With this learning media, cadets can better understand how it works. By increasing the competency of cadets, it is hoped that it can support aviation safety in Indonesia.

Considerable Piezochromism in All-Inorganic Zero-Dimensional Perovskite Nanocrystals via Pressure-Modulated Self-Trapped Exciton Emission.

Piezochromic materials refer to a class of matters that alter their photoluminescence (PL) colors in response to the external stimuli, which exhibit promising smart applications in anti-counterfeiting, optoelectronic memory and pressure-sensing. However, so far, most reported piezochromic materials have been confined to organic materials or hybrid materials containing organic moieties with limited piezochromic range of less than 100 nm in visible region. Here, we achieved an intriguing piezochromism in all-inorganic zero-dimensional (0D) Cs3Cu2Cl5 nanocrystals (NCs) with a considerable piezochromic range of 232 nm because of their unique inorganic rigid structure. The PL energy shifted from the lowest-energy red fluorescence (1.85 eV) to the highest-energy blue fluorescence (2.83 eV), covering almost the entire visible wavelength range. Pressure-modulated self-trapped exciton emission between different energy levels of self-trapped states within Cs3Cu2Cl5 NCs was the main reason for this piezochromism property. Note that the quenched emission, which is over five times more intense than that in the initial state, is retained under ambient conditions upon decompression. This work provides a promising pressure indicating material, particularly used in pressure stability monitoring for equipment working at extreme environments.

Considerable Piezochromism in All‐Inorganic Zero‐Dimensional Perovskite Nanocrystals via Pressure‐Modulated Self‐Trapped Exciton Emission

AbstractPiezochromic materials refer to a class of matters that alter their photoluminescence (PL) colors in response to the external stimuli, which exhibit promising smart applications in anti‐counterfeiting, optoelectronic memory and pressure‐sensing. However, so far, most reported piezochromic materials have been confined to organic materials or hybrid materials containing organic moieties with limited piezochromic range of less than 100 nm in visible region. Here, we achieved an intriguing piezochromism in all‐inorganic zero‐dimensional (0D) Cs3Cu2Cl5 nanocrystals (NCs) with a considerable piezochromic range of 232 nm because of their unique inorganic rigid structure. The PL energy shifted from the lowest‐energy red fluorescence (1.85 eV) to the highest‐energy blue fluorescence (2.83 eV), covering almost the entire visible wavelength range. Pressure‐modulated self‐trapped exciton emission between different energy levels of self‐trapped states within Cs3Cu2Cl5 NCs was the main reason for this piezochromism property. Note that the quenched emission, which is over five times more intense than that in the initial state, is retained under ambient conditions upon decompression. This work provides a promising pressure indicating material, particularly used in pressure stability monitoring for equipment working at extreme environments.

Insights from end-of-career general practitioners on changing working conditions and generational differences: considerations for future strategies.

The landscape of general practice has experienced notable transformations in recent decades, profoundly influencing the working conditions of general practitioners (GPs). This study aimed to examine the most salient changes affecting GPs' daily practices. Through semi-structured qualitative interviews with 15 end-of-career GPs, the study explored how these changes affected work organization, equipment, working hours, work-life balance, job satisfaction, training, patient relationships, and reputation. The interviews revealed that these changes were perceived as barriers, opportunities, or a complex interplay of both for general practice. While the interviewed GPs valued technological advancements and reported positive developments in working conditions, challenges included a gradual reduction in the range of tasks, growing administrative burdens, and less practical training for young physicians. Other changes, such as new doctor-patient dynamics, the transition from single to group practice, and differing professional expectations of the younger generation, were seen as both challenging and strengthening for general practice. By combining these factors and trade-offs observed by end-of-career GPs in our study over the past few decades with general societal changes, we provide ideas for the design of future framework conditions in general practice that might enhance the attractiveness of the profession. These insights offer key considerations that can guide future strategies for general practice and medical education.

Analisis Produktivitas Alat Berat Pada Pekerjaan Peningkatan Jalan Batas Kota Pegaf – Batas Kabupaten Manokwari Selatan

Roads in Manokwari City still need a lot to be improved, especially on the Pegaf city boundary road - South Manokwari district, because this road connects the border between the City and the district.... This study aims to calculate the productivity of heavy equipment working on road improvement work, Analyzing the balance of road improvement work tools and knowing the total cost and time required in road improvement projects. So that this research is expected to be useful for optimizing the performance of road sections and being able to provide solutions to problems that occur and can provide an overview of the process of using heavy equipment that is effective and efficient. Productivity is the ability to produce something, so it can be said that heavy equipment productivity is the ability of heavy equipment to produce something per unit of time. In general, heavy equipment work production has the same calculation principles. The basic principles of calculating heavy equipment work production are 4 steps, namely calculating actual capacity, cycle time, calculating gross work production (PKK) and calculating actual work production (PKA). So it can be concluded that the productivity of ordinary embankment excavator 173.68m3 / hour, dump truck 10 tons of ordinary embankment 45.58m3 / hour, optional embankment 36.3m3 / hour, asphalt foundation layer (HRS Base) 7.91m3 / hour, Dump truck 4 tons of Class A aggregate layer 4.02m3 / hour, Class B aggregate layer 4.06m3/hour, motor grader 315m2/hour regular embankment, 174.30 m3/hour optional embankment, 561m2/hour pavement preparation, Class A aggregate layer 274.63m3/hour, Class B aggregate layer 274.63m3/hour, vibratory roller regular embankment 159.36 m3/hour, class A aggregate layer 77.02m3/hour, class B aggregate layer 77.02m3/hour asphalt distributor binder layer 4980 liters, air compressor binder work 1365.35 liters, asphalt finisher asphalt foundation layer (HRS Base) 69.85 tons, tandem roller regular embankment 39.84m3/hour, preparation of the road body 272.98m3 / hour, paving 86.59m3 / hour, wheel loader preferred embankment 117.58m3 / hour, class A aggregate layer 114.98m3 / hour, class B aggregate layer 116.53m3 / hour and tire roller paving 104.06 tons and the total cost of all equipment rental is Rp. 254,091,569.

Influence Of Physical Work Environment Factors, Equipment And Materials On Occupational Health And Safety In Ahass City Workshop Poor

In operate activity – activity his business, company must capable utilise source Power in the company. Wrong one of the most important aspects of resources within the company is the source Power man Which works as wheel drier activity company. One of the factors that can form satisfaction Work is the existence of guarantees and conditions Work Which comfortable for member organization. And K3 is wrong One factor Which can influence satisfaction Work .

A co-designed mixed methods study on community-based gym exercise for non-ambulant adults with childhood onset disability

Purpose Explore community-based gym exercise for non-ambulant adults with childhood-onset disability. Materials and methods Non-ambulant adults with childhood-onset disability participated in four, weekly gym sessions co-facilitated by physiotherapists and exercise professionals. Practicalities of participating in the sessions were recorded via uptake and attrition, weekly surveys, and focus groups. Perspectives of those who designed/delivered the study were gathered via weekly debrief meetings. Quantitative data were analysed descriptively, qualitative data were analysed thematically. Results Ten non-ambulant adults with childhood-onset disability participated; 70% completed all exercise sessions. Focus groups identified three themes. “I wouldn’t be able to exercise…there’s no option for a community-based setting” described the lack of opportunities for exercise in gyms. “You don’t realise the benefit of coming here” highlighted benefits of exercise. “We can do better” had two sub-themes: problem solving and ingredients for community-based gym exercise. Weekly feedback and debrief meetings identified practicalities related to equipment, exercises, and collaborative working between facilitators. Conclusions Whilst there is an interest in community-based gym exercise for non-ambulant adults with childhood-onset disability, there remains a lack of inclusive gyms. Co-design of inclusive gym guidelines and condition-specific physical activity referral scheme may enhance opportunities for participation in gym exercise for adults with childhood-onset disability.

컨테이너터미널의 이송장비 자동화(YT·AGV) 경제적 타당성 분석

Purpose - The purpose of this study is to understand the limitations of yard transfer equipment composition through the economic feasibility analysis of yard transfer equipment by examining the transport equipment operation algorithm and work process composition of terminals. Design/Methodology/Approach - Yard Transfer Equipment YT is widely used at domestic and international terminals. The Domestic G terminal is interested in the construction of yard transfer equipment automation. In the study, the actual transport equipment operation algorithm process and work process composition of Gwangyang G Terminal and L Terminal in China were investigated, and economic feasibility was investigated. Findings - As a result of economic feasibility analysis, it was shown that e terminal operated by YT transfer equipment lacked economic feasibility, but the terminal operated by AGV transfer equipment attained economic feasibility. In the case of terminals operated by AGV transfer equipment, the B/C ratio was 1.8, NPV was about 27 billion won, and IRR was 13. Therefore, the terminal operated by AGV transfer equipment has economic feasibility. Research Implications - It is expected that safety accidents, cost reduction, and efficient transfer equipment management will be possible through the economic performance of yard transfer equipment. In addition, an economic feasibility analysis was presented so that terminal managers can decide on efficient investments when deciding to introduce and build yard transfer equipment, and reflect this to actively cope with the automation of yard transfer equipment.

Pemeliharaan dan Perhitungan Umur Travo Jaringan Distribusi 20 KV

The distribution transformer is one of the main components in an electric power distribution system. Without a distribution transformer, consumers cannot use electrical energy directly considering that the operating voltage in the distribution system is 20 KV or what is called a medium voltage network. Disruptions that occur in distribution transformers will result in blackouts and obstruction of the distribution of electricity to consumers so that services for electricity needs will be disrupted. For this reason, routine and scheduled maintenance of distribution transformers is required which aims to prevent sudden equipment damage, as well as maintaining optimum equipment work according to its technical age, and safe for humans and the environment, as well as reliable in the electric power distribution system. One of the causes of disruption and damage to transformers include overvoltage due to lightning, overload and unbalanced loads, loss of contact at bushing terminals, broken insulators and failure of transformer oil insulation. These disturbances cause damage to distribution transformers and stop the flow of electricity. to consumers. In calculating the usage time of a transformer, we can predict the usage time of the transformer from calculating the voltage and current used every day, so if we know the usage time of a transformer, we can prevent damage to the distribution network by replacing the transformer before the transformer is damaged.

Pengaruh Jumlah Penumpang dan Durasi Buka Tutup Pintu Terhadap Perubahan Suhu (Studi Kasus: Kereta Inspeksi PPI Madiun)

The inspection train is specialized equipment used for examining railway tracks, transporting personnel, and carrying work equipment. The inspection train must be equipped with operational tools, monitoring equipment, and work comfort equipment. One of the comfort equipment is air circulation control, which should provide comfort to the personnel while working. Factors influencing the air temperature inside the inspection train include the number of passengers and duration of door opening. This research employs the Design of Experiment data processing method, with the data analyzed using a 2-factor factorial design experiment, with the assistance of Minitab software to understand the influence of the number of passengers and the duration of door opening-closing on temperature changes inside the inspection train. The result obtained from Minitab analysis indicate that the number of passengers has a significant influence on temperature changes inside the inspection train, accounting for 5.2% of the variation. On the other hand, the duration of door opening-closing does not have a significant effect on temperature changes. Additionally, the interaction between the number of passengers and the door open-close duration does not have a significant influence on temperature changes inside the PPI Madiun Inspection Train.

Supplier selection of complex equipment in a military-civilian collaborative two-tier supply network with uncertain preference: A matching perspective

Complex equipment refers to special equipment that differs from general equipment. The collaborative development work of complex equipment in the military-civilian integration context involves numerous suppliers. We consider a two-tier supply network composed of different suppliers that participate in the development work to assemble complex equipment that cooperate with a main-manufacturer regarding spare parts. However, in terms of spare parts, a substitution relationship exists in assembly work for complex equipment. Hence, selecting a suitable supplier from the matching process between suppliers and spare parts under a military-civilian integration background is essential. This study considers three main analyses to obtain a suitable supplier for the development work of complex equipment. First, we construct a two-stage model to acquire the necessary evaluation dimension for subsequent processes. Second, we examine the evaluated attributes for the matching process based on entropy-group-DEMATEL analysis. Third, we perform information aggregation for the uncertain preference information between spare parts and suppliers using a Bonferroni mean operator. Finally, an illustrative example is presented to demonstrate the whole efficiency. Through the aforementioned analysis, we can select a suitable supplier that could participate in complex equipment military-civilian collaborative development work.

Analysis of The Influence of Technology, Latest Working Equipment Usage, and Industrial Relations Strategies Towards Business Sustainability

This research aims to contribute to modern business, new work systems, and industrial relations. This research is a longitudinal study involving manufacturing companies. Researchers collected data at two different periods. Researchers surveyed by sending a questionnaire to the company's human resources managers. Research findings show a reasonably strong relationship between implementing new work practices and better company results. However, according to the dominant theory, this result does not always occur in every case. These results indicate a greater focus on small businesses, which play a significant role in the fabric industry. The third result shows the durability or sustainability of individual practices. These new practices have proven effective in improving company performance, which may be why groups are more confident implementing them. Discriminant analysis reveals that firms' structural and market characteristics account for most of the variability in their orientation toward organizational innovation. The intensity of relationships with other companies positively correlates with using new work practices, mainly if the company operates internationally. The competition level in the company's market is also related to the use of new work practices and intense, innovative activities, especially those related to technology and the coordination of activities within the organization, such as information technology.

Relationship between employment and adaptive video gaming in individuals with physical disabilities

Purpose: The purpose of this study was to assess employment characteristics of individuals with physical disabilities who currently participate in adaptive gaming and determine if there is a positive association between adaptive gaming and employment. Materials and methods: A survey was administered to individuals with disabilities who currently use adaptive video gaming equipment to gather information on demographics, gaming habits, employment characteristics, and subjective benefits of gaming on employment. Results: The study included 606 participants. Over 57% of participants reported full-time or part-time employment. Nearly half of the participants reported using their equipment either most or all of the time to complete tasks related to work. Participants using their equipment to complete work tasks most or all of the time were more likely to be employed full-time (p = 0.0021). Over 75% of participants reported subjective benefits of adaptive video gaming on their employment. Conclusion: Participants in this study had higher rates of employment compared to national averages for individuals with physical disabilities. More frequent use of adaptive gaming equipment for work was associated with a higher likeliness of full-time employment. Most participants who were employed reported subjective benefits of adaptive gaming on employment through improvements in mental health, physical function, and cognition.

A novel attention-based long short term memory and fully connected neutral network approach for production energy consumption prediction under complex working conditions

Continuously growing demands due to the predictable faults or abnormal events of the flexible production line are becoming a challenge to easily cause the energy waste, which needs to accurately predict the real-time energy consumption of the actual production process. By reviewing the related works about prediction model approach and energy consumption analysis in the actual production application, it is necessary to overcome two main challenges: optimal prediction selection and internal relation mining of energy consumption under different equipment working conditions. To deal with the existing challenges, the paper proposes a novel attention-based Long and Short-Term Memory (LSTM) approach to predict energy consumption with temporal series under various equipment working conditions. This method offers forecasting support to form a complete prediction framework for the automatic Miniature Circuit Breaker (MCB) production line, which can be used to predict the specific working condition based on attention-based LSTM approach. By comparing various prediction approaches for energy consumption under the working condition prediction with various equipment of different production line, the Fully Connected Neutral (FCN) network approach can achieve a high accuracy and effectiveness based on MAE, R2 and MSE evaluations.