Operative Loss Research Articles

Analisis Sistem Akuntansi Persediaan Barang Dagang Pada UMKM MiMa Frozen Food

In its application, the inventory accounting system often faces problems with inaccurate recording data, such as differences between the recorded amount of inventory and the number of physical goods, which can cause financial and operational losses. The purpose of this research is to determine the recording of merchandise inventory at UMKM MiMa Frozen Food as well as inventory problems regarding the factors that cause differences between the recorded inventory amount and the number of physical goods. This research uses a qualitative descriptive method with observation, interviews and documentation. The results of this research show that inventory recording uses a perpetual recording system using the "Qasir" application system. The inventory valuation method applied is appropriate, namely by choosing the FIFO method where goods that come in first will be released first so as to avoid expiration problems. Meanwhile, several causes of inventory discrepancies are human error (data input and calculations), system errors, different goods from distributors, and damaged or expired goods that are not recorded.

Dorgan’s lateral cross pinning for displaced pediatric supracondylar fractures of the distal humerus

Background: Supracondylar humeral fractures are the most common elbow fracturesseen in children. Although closed reduction and percutaneous pin fixation is the treatment of choice for displaced supracondylar fractures of the humerus in children, controversy about which pin configuration is best in treating these fractures is ongoing. Some advocate lateral entry pins only while others advocate medial and lateral entry pins. In this study I utilized Dorgan’s cross lateral technique to fix such fractures which is believed to have the advantages of both the conventional pinning techniques. Objectives:To evaluate the functional and cosmetic outcome and complications of cross lateral pinning. Methods: Thirty cases of supracondylar humeral fractures were treated by closed or open reduction with cross lateral pin fixation under fluoroscopic guidance. The elbow was immobilized for a period of 4 weeks after which the pins were removed and physiotherapy initiated. At the end of 12 weeks the patients were evaluated clinically and radiologically and final results were assessed as per Flynn’s criteria. Results: According to Flynn’s criteria, the cosmetic result in my study was evaluated as excellent in 25 cases (83%) and good in 5 cases (17%) and functional result was evaluated as excellent cases in 23 (77%) and good in 7cases (23%). There were no cases of post operative loss of reduction of fractures. Six cases (20%) had pin tract infection while 24 patients (80%) had no complications at all. Conclusions: Cross lateral method of pinning for treating supracondylar fractures is a useful method of fixation as it gives stabilization like medio-lateral pinning and minimizes the risk of injuring the ulnar nerve like lateral pinning.

Revealing the Surface and In-Depth Operational Performances of Oxygen-Evolving Anode Coatings: A Guideline for the Synthesis of Inert Durable Anodes in Metal Electrowinning from Acid Solutions

The electrochemical performances of an oxygen-evolving anode produced by the reactivation of waste Ti substrate by a typical IrO2-Ta2O5 coating are correlated to the textural (non)uniformities of the coating and its exhaustion state. Coating degradation is considered operational loss of the activity in a metal electrowinning process. It was found that (pseudo)capacitive performances can vary over the coating surface by 20–30% and depend on the type of dynamics of the input perturbation: constant through cyclic voltammetry (CV) or discontinuous time-dependent through electrochemical impedance spectroscopy (EIS). CV-EIS data correlation enabled profiling of the capacitive properties through the depth of a coating and over its surface. The correlation was confirmed by the findings for the analysis of coating activity for an oxygen evolution reaction, finally resulting in the reliable proposition of a mechanism for the operational loss of the anode. It was found that the less compact and thicker coating parts performed better and operated more efficiently, especially at lower operational current densities.

A Multiscale Adaptive Fusion Network for Modular Multilevel Converter Fault Diagnosis

Modular Multilevel Converters (MMCs) play a crucial role in new energy grid connection and renewable energy conversion systems due to the significant merits of good modularity, flexible scalability, and lower operating loss. However, reliability is a significant challenge for MMCs, which consist of a large number of Insulated Gate Bipolar Transistors (IGBTs). Failures of the IGBTs in submodules (SMs) are a critical issue that affect the performance and operation of MMCs. The insufficient ability of convolutional neural networks to learn key fault features affects the accuracy of MMC fault diagnosis. To resolve this issue, this paper proposes a novel deep fault diagnosis framework named the Multiscale Adaptive Fusion Network (MSAFN) for MMC fault diagnosis. In the proposed MSAFN, the fault features of the raw current in an MMC are extracted by employing multiscale convolutional neural networks (CNNs) firstly, and then a channel attention mechanism is added to adaptively select the channel containing key features, so as to improve the fault diagnosis ability of the MMC in a noisy environment. Finally, the adaptive size of a one-dimensional CNN is adopted to adjust the weight of the feature channels of different scales, which are adaptively fused for fault diagnosis. Experimental validation is performed on two different MMC datasets. Experimental results confirm that the introduction of an attention mechanism of the multiscale feature adaptive fusion channel improves the recognition accuracy of the model by an average of 15.6%. Moreover, comparative experiments under different signal-to-noise ratios (SNRs) demonstrate that the MSAFN maintains accuracy levels above 96.7%, highlighting its excellent performance, particularly under noisy conditions.

OGC O03 - Clinical Outcomes of Routine Jejunostomy Feeding Following Oesophagectomy

Abstract Background Malnutrition negatively affects treatment outcomes of patients with oesophageal cancer post-oesophagectomy. Chemo(radio)therapy exacerbates nutritional deficits, and thus strategies to ensure adequate nutritional intake are necessary. Feeding jejunostomies are commonly used for nutritional support to maintain nutrition and reduce the effect of complications but may be associated with increased morbidity. This study examines the impact of routine post-operative jejunostomy feeding on postoperative weight loss in patients who have undergone oesophagectomy. Method A retrospective review of patients undergoing oesophagectomy between January 2012-December 2014 and January 2016-December 2019 at a single oesophagogastric unit was performed. Routine post operative feeding with overnight feeding on discharge was introduced in 2015. 507 patients were identified and separated into two groups (245 without routine post operative jejunostomy feeding, 262 with routine feeding). Primary outcomes measured included post operative weight loss (2 weeks, 6 weeks, 3 months and 6 months). Secondary outcomes investigated included length of hospital stay, complications and long-term survival. Subgroup analyses were performed on patients who have experienced complications and those receiving different treatments. Results Weight loss was less in patients discharged with jejunostomy feeding at 2 weeks, 6 weeks, 3 months, 6 months (2.92kg vs 5.49kg, 3.39kg vs 6.37kg, 4.81kg vs 7.96kg, 7.25kg vs 9.285kg, p<0.05). In those with complications, routine feeding resulted in less weight loss up to 3 months (p<0.05). Jejunostomy feeding experienced less weight loss in subgroups surgery alone (7.99kg vs 8.72kg, p<0.001), neoadjuvant therapy with surgery (8.02kg vs 9.90kg, p<0.05), and neoadjuvant therapy, surgery with adjuvant therapy (6.29kg vs 9.14kg, p<0.05). Average hospital stay was 16 days with feeding, 19 days without. Long-term survival was greater with jejunostomy feeding (P=0.04). Conclusion Post-operative jejunal feeding is associated with significantly reduced post operative weight loss. This is reflected in patients who received surgery alone, neoadjuvant therapy with surgery and neoadjuvant therapy with surgery and adjuvant therapy. Patients with complications who had routine jejunostomy feeding also experienced significantly less weight loss than those without routine jejunostomy feeding. Routine jejunostomy feeding is associated with a shorter length of hospital stay and is associated with a greater long-term survival.

Simulation and Optimization of Automated Guided Vehicle Charging Strategy for U-Shaped Automated Container Terminal Based on Improved Proximal Policy Optimization

As the decarbonization strategies of automated container terminals (ACTs) continue to advance, electrically powered Battery-Automated Guided Vehicles (B-AGVs) are being widely adopted in ACTs. The U-shaped ACT, as a novel layout, faces higher AGV energy consumption due to its deep yard characteristics. A key issue is how to adopt charging strategies suited to varying conditions to reduce the operational capacity loss caused by charging. This paper proposes a simulation-based optimization method for AGV charging strategies in U-shaped ACTs based on an improved Proximal Policy Optimization (PPO) algorithm. Firstly, Gated Recurrent Unit (GRU) structures are incorporated into the PPO to capture temporal correlations in state information. To effectively limit policy update magnitudes in the PPO, we improve the clipping function. Secondly, a simulation model is established by mimicking the operational process of the U-shaped ACTs. Lastly, iterative training of the proposed method is conducted based on the simulation model. The experimental results indicate that the proposed method converges faster than standard PPO and Deep Q-network (DQN). When comparing the proposed method-based charging threshold with a fixed charging threshold strategy across six different scenarios with varying charging rates, the proposed charging strategy demonstrates better adaptability to terminal condition variations in two-thirds of the scenarios.

Achieving successful gas plant construction: A risk modelling framework with quantitative risk-based approach to schedule management

The construction of gas plants often experiences delays caused by various factors, which can lead to significant financial and operational losses. This research aims to develop an accurate risk model to improve the schedule performance of gas plant projects. The model uses Quantitative Risk Analysis (QRA) and Monte Carlo simulation methods to identify and measure the risks that most significantly impact project schedule performance. A comprehensive literature review was conducted to identify the risk variables that may cause delays. The risk model, pre-simulation modeling, result analysis, and expert validation were all developed using a Focused Group Discussion (FGD). Primavera Risk Analysis (PRA) software was used to perform Monte Carlo simulations. The simulation output provides information on probability distribution, histograms, descriptive statistics, sensitivity analysis, and graphical results that aid in better understanding and decision-making regarding project risks. The research results show that the simulated project completion timeline after mitigation suggested an acceleration of 61–65 days compared to the findings of the baseline simulation. This demonstrates that activity-based mitigation has a major influence on improving schedule performance. This research makes a significant contribution to addressing project delay issues by introducing an innovative and effective risk model. The model empowers project teams to proactively identify, measure, and mitigate risks, thereby improving project schedule performance and delivering more successful projects.

A lightweight MMC topology with recombined half‐bridge submodules for DC fault ride‐through

AbstractThe lightweight of modular multilevel converter (MMC) and the DC faults ride‐through ability are main challenges for MMC‐high voltage direct current (HVDC) transmission systems. By introducing the concept of time‐division multiplexing, an arm multiplexing MMC (AM‐MMC) topology with high utilization of submodules is presented to reduce the weight and volume of MMC. In order to block the DC side fault current, this paper proposes a novel submodule in AM‐MMC, instead of using full‐bridge submodules. The proposed recombined half‐bridge submodules of AM‐MMC (RHAM‐MMC) contains four half‐bridge submodules and an IGBT with reverse parallel diodes. The topology and operating principle of RHAM‐MMC are introduced in detail. The time‐division multiplexing of middle arms between upper and lower arms is achieved by introducing arm selection switches. Thus, a new type of arm switch and switching method is designed based on the switch state. The DC faults ride‐through strategy is carried out based on its DC fault characteristic analysis. In addition, the economy analysis is conducted on the switching loss and operating loss of RHAM‐MMC. Compared with the fault ride‐through capability of other sub‐modules (SMs), RHAM‐MMC performs better in terms of investment cost and device losses. The simulation results based on MATLAB/Simulink reveal that RHAM‐MMC can achieve the DC side fault ride‐through and show effectiveness of the DC fault ride‐through control strategy.

The effect of pin distractor assistance on the reduction of fibular fractures in the treatment of ankle fracture: A retrospective case-control study.

This study will evaluate the therapeutic effect of pin distractor assisted reduction of fibular fracture on ankle fracture. A retrospective analysis was performed on 98 patients diagnosed as ankle fracture or pilon fracture. These patients were all combined with fibular fracture. Retrospective analysis included 48 patients in the experimental group (distractor assisted reduction) and 48 patients in the control group (without pin distractor). The statistical indexes include: the time spent in fracture reduction and fixation, the length of surgical incision, the operative blood loss of fracture operation, the incidence of incision skin necrosis, the incidence of fracture end splitting during reduction, the quality of fracture reduction, the time of fracture healing, infection rate, and The American Orthopedic Foot and Ankle Society score at the last follow-up. There were statistical differences between the 2 groups in the time spent in the reduction and fixation of fractures, the incidence of fracture end splitting during reduction, the quality of anatomical reduction of fractures, and the healing time of fractures. The experimental group was better than the control group. In addition, for patients with long spiral fracture, comminuted fracture, osteoporotic fracture and preoperative delay time for operation more than 2 weeks, the time spent in the reduction and fixation of fracture, the operative blood loss of fracture operation, the incidence of fracture end splitting during reduction, the quality of anatomical reduction of fracture, and the healing time of fracture in the experimental group are also better than those in the control group. The pin distractor assisted reduction of fibular fracture has the advantages of simple operation, less trauma, short operation time, less operative blood loss, and fewer complications. It is especially suitable for patients with long spiral fibular fracture, comminuted fracture, osteoporotic fracture, and long preoperative delay time in ankle fracture.

СИСТЕМАТИЗАЦИЯ СОВРЕМЕННОГО МЯСОРЕЗАТЕЛЬНОГО ОБОРУДОВАНИЯ И ОЦЕНКА НЕИСПРАВНОСТЕЙ ПРОМЫШЛЕННЫХ ВОЛЧКОВ

Based on the analysis of the designs of modern meat cutting equipment used by processing plants, their great diversity has been established, justified by the design and technological requirements for this type of machines. (Objective of the study) To establish the features characterizing industrial grinders, compile their classification, determine the main faults and the degree of their influence on the operability of industrial grinders. (Materials and methods) Design and technological requirements for industrial grinders have been determined. An analysis has been carried out and the main causes of malfunctions of industrial grinders have been identified. Structural parameters characterizing the technical condition of industrial grinders have been established. A priori ranking technique has been selected based on an expert assessment by specialists of the main faults of industrial grinder units. (Results and discussion) The features characterizing industrial grinders have been established, based on this, their classification has been compiled. A structural diagram of the "Industrial grinder" technical system is presented. The main faults and the degree of their influence on the loss of operability of the devices under consideration during operation have been determined. The entire set of industrial grinding machine malfunctions is grouped relative to three subsystems: cutting, feeding and driving. During the malfunction analysis, 10 most important of them were identified, affecting the grinder operability and its technological process performance. (Conclusions) The entire set of presented industrial grinding machine malfunctions was ranked by weight. A 10-point system was used for their assessment and points were assigned in accordance with complexity within the range from 1 to 10. The first group included malfunctions with ranks higher than 238 (malfunctions with a higher probability of occurrence). The second group included malfunctions with a rank value lower than 150 (malfunctions with a lower probability of occurrence). It was found that the maximum weight has malfunctions designated as n6, n10, n9. They characterize the technical condition of the cutting and feeding subsystems. Priority for maintenance and control should be given to these subsystems

Distributed Optimal Control of Energy Storages in DC Microgrids for Operation Loss Minimization With Communication Delays

Distributed Optimal Control of Energy Storages in DC Microgrids for Operation Loss Minimization With Communication Delays

Tri-State Modulation with Operating Losses Minimization for a Soft-Switching Bidirectional DC-DC Converter

Tri-State Modulation with Operating Losses Minimization for a Soft-Switching Bidirectional DC-DC Converter

‘A clash of cultures’: varying perspectives on the Rhodesian incorporation into the South African special forces

ABSTRACT The South African Special Forces shared a close bond with the Rhodesian Special Air Service during the 1970s. Prior to the political changes in Rhodesia in 1980, a secret offer had been extended by the South African Defence Force to the Special Air Service to join the South African Special Forces. Following the 1979 elections in Rhodesia, many Rhodesian SAS operators joined the South African Special Forces to form 6 Reconnaissance Commando. However, the cultural differences and friction between the South African and Rhodesian operators hindered long-term cooperation. The potential for a much broader integration of Rhodesian experience was lost due to the clash in cultures between the South Africans and Rhodesians, and the loss of these Rhodesian operators due to dissatisfaction represented a missed opportunity for South Africa to have significantly strengthened its special forces. After only one operation in 1981, in which three Rhodesian operators were killed in action, most of the Rhodesians opted to end their contract with the South African Special Forces, which ultimately resulted in the closure of the Rhodesian Commando. This article examines why the incorporation of the Rhodesians did not work as envisioned from both a Rhodesian and South African perspective.

Spectral induced polarization measurements to detect different scales in oil and gas production tubing

Different varieties of scales, such as iron sulfide (FeS) scale, and calcium carbonate (CaCO3), commonly precipitate within oil and gas production tubing, posing operational challenges and production losses. It is essential to implement efficient mitigation strategies and preserve production integrity to detect and characterize these scales in an accurate and efficient manner. Prior studies have explored Spectral induced Polarization (SIP) for the early detection of FeS within porous media, mainly for environmental applications or for identifying FeS in carbonate formations from the perspective of reservoir characterization. This study focuses on applying SIP to address production-related issues in production tubing. For this purpose, six actual subsurface scale samples were analyzed using X-ray Diffraction, X-ray Fluorescence, and SIP techniques. These samples were categorized into three primary groups based on their composition: Pyrrhotite, Goethite, and Calcium Sulfate Hydrate or Calcite. The results indicate that combining phase shift and conductivity as frequency functions makes it possible to develop an approach to classify and differentiate between various scale types. This information could be instrumental in developing methods that can be potentially integrated into tubing systems to detect and characterize the different scale types.

Global status and prospects for hybrid hydrogen-natural gas systems for power plants in Sub-Saharan Africa

Abstract With the lowest power access rate in the world (51.4%), Sub-Saharan Africa is experiencing a severe energy crisis. Many of the region’s countries report access rates of less than 20%. Even though Sub-Saharan Africa has the lowest global greenhouse gas emissions, the region still suffers from climate change, especially extreme droughts. Efforts to tackle these issues by implementing a macro-grid system that integrates natural gas and renewable energy resources have not been successful in reducing the adverse environmental effects and energy poverty. This study highlights research on the technological approaches used in hybrid hydrogen/natural gas in heavy-duty dual-fuel power plants, their benefits and drawbacks, and their economic viability. The goal of this is to suggest an improved and more reliable hub energy system for Sub-Saharan Africa. While all countries in Sub-Saharan Africa utilize natural gas plants, only 17% are involved in hydrogen production, and none have implemented hybrid methods for electrical energy generation. Studies using experimental and numerical analyses have shown that adding hydrogen to natural gas plants increases overall efficiency and lowers CO2 emissions. Furthermore, this research introduces an energy hub approach that incorporates carbon capture and power-to-X technologies, potentially improving efficiency by 42%. These strategies not only support environmental sustainability but also provide economic advantages by decreasing operational and financial losses in power plants. The results reveal a new pathway for the region’s transition to sustainable energy: identifying key locations for the technological and economic viability of hybrid hydrogen/natural gas power plants in Sub-Saharan Africa.

FINANCIAL FEASIBILITY OF FOOD PROCESSING INDUSTRY: LESSONS FROM TOFU INDUSTRY IN TRUNAN VILLAGE, MAGELANG

This study aims to examine the financial analysis of the Food Processing Industry in Tofu Center of Trunan Village in an effort to maintain the calculation of operational costs, profit and loss, and investment in minimizing investment losses. In particular, this study aims to calculate the Net Present Value (NPV), Internal Rate of Return (IRR), Payback Period (PP), and Profitability Index (PI) in the Processed Food Industry in the Tofu Center of Trunan Village. The urgency of this research is to maintain the sustainability of the tofu industry in Trunan Village, which is one of the leading MSME centers in Magelang City and in an effort to maintain food security. Based on the results of the analysis it was found that financially the MSME management in the Tofu Center Food Processing Industry in Trunan Village did not fulfill the feasibility aspect. Net Present Value (Rp 2,147,030,794), Internal Rate of Return shows 2%, Payback Period 2 Years 8 months, and Profitability Index 4.10. Keywords: Feasibility Study, NPV, IRR, PP, PI

Shape of fragments cloud behind heterogeneous screen by a space debris particle impact

Technogenic pollution of near-Earth space poses a threat to the functioning of spacecraft. Collisions between space debris (SD) and spacecraft (SC) structures can have catastrophic consequences or cause localized damage, leading to the loss of SC operability or the failure of certain functions. The SC body must effectively protect the internal equipment from various external impacts, be technologically feasible to manufacture, and have as little mass as possible. As a result, the task of designing spacecraft bodies and protective screens for low-orbit SC is particularly relevant due to the large concentration of SD in low Earth orbits.A comparative numerical study was conducted to evaluate the effectiveness of various thin shields in protecting against impacts from space debris particles. The study examined homogeneous shields made of A356 aluminum alloy and 316L stainless steel, as well as volumetrically reinforced composite shields produced using additive manufacturing with steel inclusions, and shields with a gradient distribution of steel throughout the thickness of an aluminum matrix, all with the same areal density. In all the heterogeneous plates considered, the volumetric concentration of steel was 36 %. The study covered an interaction velocity range of 2–9 km/s. Numerical modeling results indicated that the structure of the thin heterogeneous plate does not affect the shape of the debris cloud formed behind the protective shield. The findings of this study can serve as a basis for selecting materials for the development of more effective protection for spacecraft against high-velocity impacts.

Enhancing efficiency and economy of hydrogen-based integrated energy system: A green dispatch approach based on exergy analysis

Hydrogen-based integrated energy system holds promise for leveraging the low carbon advantage of hydrogen, but inefficiency of electrolysis hydrogen production leads to significant exergy loss within its operation. Addressing this, this paper focuses on the energy-saving and economic operation of the hydrogen-based integrated energy system, proposes a novel green dispatch approach using loss cost as the objective function and establishes a refined loss cost accounting model based on exergy analysis theory. Firstly, derived from the analogy of exergy loss, the concept and accounting framework of system loss cost are proposed. Secondly, employing exergy analysis and consistent unit exergy cost principle, equipment operation loss cost is calculated through energy, exergy flows analysis and cost allocation. Thirdly, utilizing the total of equipment operation loss cost, wind curtailment penalty cost, and transmission line loss cost as the objective function, a green dispatch model is formulated to minimize overall loss cost while ensuring energy balance and other constraints. Finally, simulations analysis are conducted. The results show that compared to economic dispatch, minimized exergy loss dispatch and multi-objective dispatch methods, proposed approach increases exergy efficiency by 0.54 %, reduces cost by 6.13 % and increases the scale of hydrogen utilization by 3.45 %, respectively.

The Influence of Operating Profit and Loss and the Size of The Public Accounting Firm on Audit Delay

This research aims to determine and analyze the influence of Operating Profit and Loss and the Size of the Public Accounting Firm (KAP) partially on Audit Delay. The influence of Operating Profit and Loss and Size of the Public Accounting Firm (KAP) simultaneously on Audit Delay in companies listed on IDX-MES BUMN 17 Period 2018-2022. This research uses a descriptive method with a quantitative approach. The statistical test tool uses the help of the IBM SPSS Statistics 27 version program. Operating Profit and Loss partially influence Audit Delay with a value of count 3,832 > table 2,018. The size of the Public Accounting Firm partially has no effect with a value of count -1.605 < table 2.018. Operating Profit and Loss and the Size of the Public Accounting Firm simultaneously influence Audit Delay with a value of Fcount 7.391 > Ftable 3.214. The R Square value obtained was 26.0%; the remaining 74.0% was influenced by other factors not examined in this research. Thus, the relationship between the variables in this study has a trim level of relationship. Companies should pay more attention to the timeliness of submitting financial reports, considering the importance of economic reports in decision-making. The manager evaluates the performance of each division to minimize delays in submitting financial reports. Future researchers can add independent variables and observation periods and expand the research object. Researchers want to know the extent to which these two variables play a role in influencing Audit Delay, especially in companies listed on IDX-MES BUMN 17, and can provide further information.

Enhanced Systemic and Mucosal Immune Responses to Haemophilus parasuis by Intranasal Administration of Lactic-Co-Glycolic Acid Microspheres.

Swine Glasser's disease, instigated by Haemophilus parasuis (H. parasuis), is a significant bacterial infection that causes substantial economic losses in pig farming operations. The role of mucosal immunity is pivotal in defending against H. parasuis. This study focused on the construction of PLGA microspheres that encapsulate the outer membrane protein OMP16 from H. parasuis (PLGA-OMP16) and evaluated their immunological effectiveness in a mouse model. After being intranasally immunized twice, the PLGA-OMP16 microspheres effectively induced IgAs in saliva and nasal and lung fluids. The PLGA-OMP16 microspheres also significantly increased the number of anti H. parasuis IgGs in serum. Furthermore, the PLGA-OMP16 microspheres triggered elevated levels of IL-2, IL-4, and IFN-γ. The mice vaccinated with PLGA-OMP16 showed a significant reduction in H. parasuis burden in the spleen and lungs following bacterial challenge. These results indicate that intranasal immunization using PLGA microspheres is a promising adjuvant delivery system for vaccines targeting H. parasuis.