Simple Production Research Articles

Analysis of Production Cost Calculations Using The Full Costing Method of Mantahukan Fish on Ud. Kerupuk Ikan Kembar


 
 
 
 Abstract : This research was conducted at UD Kerupuk Ikan Kembar which operates in the Mantahukan fish cracker product industry, with the aim of knowing the calculation of the cost of production at UD Kerupuk Ikan Kembar and to analyze the application of the full costing method for calculating the cost of production at UD Kerupuk Ikan Kembar. This type of research uses quantitative descriptive research. Data was collected using documentation, interviews, and data analysis methods in the form of descriptive analysis. The research results show that UD Kerupuk Ikan Kembar still uses a simple production cost calculation method by adding up production costs consisting of raw material costs, direct labor costs, and supporting costs. Application of the full costing method by detailing all production costs that occur, including raw material costs.
 
 
 

Hilbert space fragmentation and slow dynamics in particle-conserving quantum East models

Quantum kinetically constrained models have recently attracted significant attention due to their anomalous dynamics and thermalization. In this work, we introduce a hitherto unexplored family of kinetically constrained models featuring conserved particle number and strong inversion-symmetry breaking due to facilitated hopping. We demonstrate that these models provide a generic example of so-called quantum Hilbert space fragmentation, that is manifested in disconnected sectors in the Hilbert space that are not apparent in the computational basis. Quantum Hilbert space fragmentation leads to an exponential in system size number of eigenstates with exactly zero entanglement entropy across several bipartite cuts. These eigenstates can be probed dynamically using quenches from simple initial product states. In addition, we study the particle spreading under unitary dynamics launched from the domain wall state, and find faster than diffusive dynamics at high particle densities, that crosses over into logarithmically slow relaxation at smaller densities. Using a classically simulable cellular automaton, we reproduce the logarithmic dynamics observed in the quantum case. Our work suggests that particle conserving constrained models with inversion symmetry breaking realize so far unexplored dynamical behavior and invite their further theoretical and experimental studies.

Applying ergonomics for beyond the earth: Integrating participatory ergonomic design for sending a human to space.

The aviation industry is a complex socio-technical system that has various parts which can be optimized by human factors and ergonomics. The aim of this study was to provide insight into the collaborative ergonomic design process for an astronaut workstation within a small spaceship. Having defined the project goals and other quantitative information such as anthropometric dimensions, the Catia software was then used for 3D modeling. Following the initial modeling, the RULA method was used to conduct the initial ergonomic analysis. Following the creation of a simple product prototype, other ergonomic analyses such as mental workload, perceived physical exertion, and usability were carried out. The results of the preliminary ergonomic analysis indicated that the RULA score was acceptable (the final scores were 2 and 3 for the nearest and the farthest controls). Furthermore, the secondary ergonomic analyses were all satisfactory. The mental workload, SUS, and Borg scores for Bedford were, respectively, 2.2, 85.1, and 11.4. The proposed product initially received an acceptable ergonomic store; nevertheless, in order to continue producing this product, ergonomic concerns must be taken into consideration.

Choice of model and re‐nesting probability function influences behaviour of avian seasonal productivity models and their demographic predictions

Measuring seasonal productivity is difficult in multi‐brooded species without labour‐intensive ringing studies. Individual‐based (IB) models have been used to estimate seasonal productivity with no direct knowledge of number of nesting attempts, but they are often based on simplified re‐nesting probability (φR) step‐functions instead of observed or more biologically plausible ones. We present a new, open‐source IB seasonal productivity model parameterized from studies of Black Redstart Phoenicurus ochruros and Yellowhammer Emberiza citrinella. We examined how the φR function shape (empirical versus simplified) influenced (1) model performance, (2) re‐nesting compensation and (3) population‐level predictions of a simulated management intervention. Population‐level predictions were made only for Yellowhammer as we had more detailed demographic data, such as survival rates, available. Pattern‐oriented modelling revealed that IB models produced realistic within‐population distributions of breeding parameters, and those specified with an observed or empirically derived φR function generally outperformed those specified with simpler step functions. Strength of re‐nesting compensation differed depending on the φR function used. For Yellowhammers, type of φR function in IB models marginally influenced population‐level predictions of a simulated management intervention (potential population growth rate increased between 23% and 29% relative to no management intervention). In contrast, a simple deterministic productivity model, which did not simulate re‐nesting compensation, predicted a 41% increase in potential population growth. At a population level, choice of φR function may have less influence on IB model predictions, but choice of model itself (IB versus deterministic) may have substantial impact. We discuss how more biologically plausible φR functions might either be observed directly, derived from nest data, or estimated from proxy information such as moult or brood patch changes.

Continuous-flow Synthesis of Ruthenium Nanoparticles using a Microreactor for the Selective Hydrogenation Reaction

Abstract: In this study, a continuous flow reactor was used to synthesize Ru nanoparticles with a well-distributed size and good stability. The effects of reactant dilution and flow rate on the synthesis were investigated, and it was found that optimization of these parameters was critical in obtaining small-sized Ru nanoparticles using a solution of 0.00025 M RuCl3.3H2O and 0.001M NaBH4 at a flow rate of 30mL/h. The Ru nanoparticles obtained were coated with CTAB surfactant, which was confirmed by TEM and PSD studies. The interaction between the surfactant and the nanoparticles was also confirmed by FTIR analysis. The synthesized Ru nanoparticles were then tested for their catalytic activity in high-pressure alkene hydrogenation and were found to be effective in producing the corresponding hydrogenated products in good yields. Furthermore, the catalytic effect of Ru nanoparticles was utilized for the synthesis of two natural products, brittonin A and dehydrobrittonin A. Both products were successfully isolated in measurable yields. This synthesis protocol had several advantages, including low catalyst loading, no use of additives, wide substrate scope, simple product separation, and catalyst recovery up to 8 times. Overall, this study demonstrated the potential of continuous flow reactor technology for synthesizing stable and well-distributed nanoparticles, and the effectiveness of Ru nanoparticles as catalysts in various chemical reactions. The study's findings have important implications for the development of more efficient and sustainable chemical synthesis protocols

Design, Analysis, and Comparison of Permanent Magnet Claw Pole Motor with Concentrated Winding and Double Stator

Permanent magnet motors have become an important component of industrial production, transportation, and aerospace due to their advantages of high torque density, high power density, high reliability, low losses, and high efficiency. Permanent magnet claw pole motor (PMCPM) is a special type of transverse flux motor which has a higher torque density compared to traditional permanent magnet motors. Due to the absence of winding ends, its axial space utilization is high, and the usage of windings is greatly reduced, reducing the cost and weight of the motor. PMCPM has the advantages of small space, a light weight, a high torque density, a high efficiency, and simple production, which have potential for use in the field of electric vehicles. The double-stator structure design can improve the torque density, efficiency, and radial space utilization of PMCPM, which helps to expand their applications in the field of electric vehicles. This article designs two PMCPM with concentrated winding while different rotor structures (PMCPM1 and PMCPM2) and a three-dimensional finite element method is employed to compare and analyze the performance of PMCPM1 and PMCPM2 and the traditional PMCPM (TPMCPM). Multiphysics analysis is carried out for PMCPM1 and PMCPM2. The stress of the inner and outer stators during interference assembly are analyzed. In this paper, a hybrid material core design is proposed, in which the stator yoke is rolled by silicon steel material and the stator claw pole is pressed by the SMC die method. The multiphysics simulation performance of the PMCPM1 and PMCPM2 with hybrid cores is analyzed.

Characterizing Reef Net Metabolism Via the Diel Co‐Variation of pH and Dissolved Oxygen From High Resolution in Situ Sensors

AbstractCoral reefs are subject to degradation by multiple environmental stressors which are predicted to intensify. Stress can alter ecosystem composition, with shifts from hard coral to macroalgae dominated reefs often accompanied by an increase in soft corals and sponges. Such changes may alter net ecosystem metabolism and biogeochemistry by shifting the balance between photosynthesis, respiration, calcification and dissolution. We deployed high temporal resolution pH and dissolved oxygen (DO) sensors at four Caribbean reef sites with varying covers of hard and soft corals, sponges and macroalgae. The resultant data indicated that the strength of the “metabolic pulse”, specifically the co‐variation in daily pH and DO oscillations, was driven by the net balance of light ‐dependent and ‐independent metabolism. pH and DO were positively correlated over the diel cycle at coral dominated sites, suggesting that photosynthesis and respiration were the major controlling processes, and further indicated by agreement with a simple production:respiration model. Whereas, at a site with high macroalgal cover, pH and DO decoupling was observed during daylight hours. This indicates that an unidentified light‐driven process altered the expected pH:DO relationship. We hypothesize that this could be mediated by the higher levels of macroalgae, which either stimulated bacterial‐mediated carbonate dissolution via the production and release of allelopathic compounds or retained oxygen, evolved during photosynthesis, in the gaseous form in seawater (ebullition). Our work demonstrates that high resolution monitoring of pH and DO provides insight into coral reef biogeochemical functioning and can be key for understanding long‐term changes in coral reef metabolism.

A new type of artificial airway sealer used between artificial airway and ventilator pipeline

The need for mechanical ventilation due to severe hypoxemia and acute respiratory distress syndrome has increased dramatically in the global pandemic of severe respiratory infectious diseases. In clinical scenarios, it is sometimes necessary to briefly disconnect the ventilator pipeline from the artificial airway. Still, this operation can lead to a sharp drop in airway pressure, which is contrary to the protective lung ventilation strategy and increases the risk of environmental exposure to bioaerosol, posing a serious threat to patients and medical workers. At present, there is yet to be a practical solution. A new artificial airway device was designed by the medical staff from the department of critical care medicine of Beijing Tiantan Hospital, Capital Medical University, based on many years of research experience in respiratory support therapy, and recently obtained the National Utility Model Patent of China (ZL 2019 2 0379605.4). The device comprises two connecting pipes, the sealing device body, and the globe valve represented by the iridescent optical ring. It has a simple structure, convenient operation, and low production cost. The device is installed between the artificial airway and the ventilator pipeline and realizes the instantaneous sealing of the artificial airway by adjusting the shut-off valve. Using this device to treat mechanically ventilated patients can minimize the ventilator-induced lung injury caused by the repeated disconnection of pipelines, avoid iatrogenic transmission of bioaerosols, and realize dual protection for patients and medical workers. It has extensive clinical application prospects and high health and economic value.

Doing (food) without meat? Accomplishing substitution and qualifying substitutes in household food practices

Excessive meat consumption is associated with environmental, ethical and public health concerns. Substituting meat with plant-based alternatives has been located as a key strategy for consumers to reduce their meat intake. While a growing body of research seeks to measure consumers’ acceptance of substitute foods, less attention has been paid to how meat substitution is organised through everyday practices. Based on 50 interviews with consumers with varying levels of meat consumption in Norway, this paper explores how substitution is accomplished in everyday life, and how substitutes are leveraged in the project of meat reduction. A theoretical framework connecting theories of social practice and food qualification allowed investigating substitution as a contextually contingent process rather than the outcome of a simple product swap. The paper finds that many participants were open to the idea of meat substitution, and meatless meals could be acceptable and often desirable. However, substitution was complicated by a prevalent scepticism towards prefabricated substitute products and lacking competence to provide home-cooked alternatives fulfilling expectations in established food practices. The paper argues that ‘qualifying’ foods as substitutes depends on a range of factors beyond the material reconstruction of meatiness present in prefabricated products, problematising the idea of substitution as a straightforward strategy for meat reduction so long as consumers are motivated and/or have access to plant-based options. Shifting consumption from meat to plant-based alternatives require fundamental changes in the organisation of food environments and eating practices beyond measures targeting consumer attitudes or increasing the availability of convenient substitute products.

소비자의 지속가능한 의생활 체험용 업사이클링 DIY 키트 개발

Background/Objectives: The aim of this study is to develop an experiential upcycling DIY kit using Subtraction Cutting, with the goal of promoting sustainable living for consumers during a time when environmental issues are increasingly important. Methods: As a theoretical study, this research examines the current state of sustainable clothing and the design methods of Zero Waste fashion through previous studies. For the practical study, Subtraction Cutting is selected as a technique that can be easily applied by ordinary consumers. Six experiential upcycling clothing kits are developed, with two kits for each of the three main techniques. The participants use a mix of materials, including their own used clothing, waste sheets, and spare fabrics, for the project. Results: The clothing items, including women's sleeveless top, jacket, vest, and skirt are mixed and matched with various materials. This kit is intended for time-limited experiential events for the general public and is designed for simple production. The focus is on enhancing sustainability not only by recycling clothes but also by extending the life of garments through shape deformation, utilizing the features of the Subtraction Cutting design. Conclusion/Implications: This study developed a clothing upcycling kit with enhanced sustainability, using Subtraction Cutting, that can be easily attempted by general consumers. The kit utilizes participants' used clothing, which could extend the life of the product. However, further research is needed to simplify the process and enable shape changes.

Synthetic Anti-Cocaine Nanoaccine Successfully Prevents Cocaine-Induced Hyperlocomotion.

Cocaine is one of the most widely used and increasingly popular illicit psychoactive drugs. Unlike other commonly used substances of abuse, cocaine has no pharmacological therapies to treat addiction or aid in rehabilitation. Immunopharmacology has long been touted as a possible avenue to develop effective anticocaine therapies; however, lack of efficacy and designs which are not consistent with simple large-scale production have hindered vaccine translation. We have designed and synthesized a peptide-based anti-cocaine immunogen which we have shown is capable of inducing physiologically relevant immune responses in mice as part of a self-adjuvanting delivery system or in combination with the human-approved commercial adjuvant MF59. We have demonstrated that immunization with the reported vaccine elicits high titers of anti-cocaine IgG and prevents cocaine-induced hyperlocomotion in an in vivo murine model. This peptide-hapten immunogen along with self-adjuvanting liposomal-based delivery system provides a platform for the development of effective anti-drug vaccines.

Visualizing Ribbon-to-Ribbon Heterogeneity of Chemically Unzipped Wide Graphene Nanoribbons by Silver Nanowire-Based Tip-Enhanced Raman Scattering Microscopy.

Graphene nanoribbons (GNRs), a quasi-one-dimensional form of graphene, have gained tremendous attention due to their potential for next-generation nanoelectronic devices. The chemical unzipping of carbon nanotubes is one of the attractive fabrication methods to obtain single-layered GNRs (sGNRs) with simple and large-scale production. The authors recently found that unzipping from double-walled carbon nanotubes (DWNTs), rather than single- or multi-walled, results in high-yield production of crystalline sGNRs. However, details of the resultant GNR structure, as well as the reaction mechanism, are not fully understood due to the necessity of nanoscale spectroscopy. In this regard, silver nanowire-based tip-enhanced Raman spectroscopy (TERS) is applied for single GNR analysis and investigated ribbon-to-ribbon heterogeneity in terms of defect density and edge structure generated through the unzipping process. The authors found that sGNRs originated from the inner walls of DWNTs showed lower defect densities than those from the outer walls. Furthermore, TERS spectra of sGNRs exhibit a large variety in graphitic Raman parameters, indicating a large variation in edge structures. This work at the single GNR level reveals, for the first time, ribbon-to-ribbon heterogeneity that can never be observed by diffraction-limited techniques and provides deeper insights into unzipped GNR structure as well as the DWNT unzipping reaction mechanism.

Economic, Social, and Environmental Impacts of the Economic Empowerment Program in Gampong Kuta Barat, Sukakarya District, Sabang City, Aceh Province

Sabang City, Aceh Province has marine capture fisheries production reaching 5,150 tons in 2015 (BPS Aceh, 2015). The fishing profession is one of the professions of the majority of the population. Despite having abundant catches, fishermen in this village still carry out simple fish production. The caught fish is sold and if it does not sell well it is smoked for resale. This fish processing process has not optimally provided economic value to the community and provided excess carbon emissions. Seeing this potential and problem, PT Pertamina (Persero) MOR I Fuel Terminal Sabang conducts an economic empowerment program for fish management in the form of providing capital and business facilities, providing business development assistance, entrepreneurial training, and business assistance. The program is evaluated to determine economic, social, and environmental impacts with a descriptive qualitative research approach. The result of this research is that the fish processing economic empowerment program carried out by PT Pertamina (Persero) MOR I Fuel Terminal Sabang has a significant impact on the economic, social, and environmental sectors. The economic impact can be seen from the economic addition of fishermen of the Pepper Garden Group (Kkemer) of Rp8,000,0000 per month from fish processing in the form of raw and fried crackers, fish chips, nuggets, and other processed fish products. Socially, the impact of this empowerment program is the creation of a system of work/management of fish products which was originally carried out individually into groups, has group independence that can carry out production functions consistently and active involvement of stakeholders. While the positive environmental impact is shown by reducing carbon emissions in the air by 105 Kg CO2 per month resulting from changing fish processing by tapping into drying and frying.

High-sensitivity fiber optic Fabry-Perot ultrasonic sensor based on a grooved silicon diaphragm for partial discharge detection.

An extrinsic fiber optic Fabry-Perot interferometric (EFPI) ultrasonic sensor based on a grooved silicon diaphragm for partial discharge (PD) detection has been proposed. The size of the groove is determined by finite element simulation, which allows the resonant frequency of the sensor to meet the requirements of PD ultrasonic detection and improves the sensitivity of the sensor by 5.07 times compared with that based on a traditional circular diaphragm. The microelectro-mechanical system process is used to fabricate the diaphragm on a silicon-on-insulator wafer, and the prepared diaphragm has a grooved section with a diameter of 829.34µm and a thickness of only 2.09µm. At its resonant frequency of 61.5kHz, the acoustic pressure sensitivity of the sensor is 172.42mV/Pa. The ultrasonic signal detection capability of the sensor is verified in the PD experiment. Furthermore, the characteristics of the corona discharge are successfully manifested based on the ultrasonic waves detected by the EFPI sensor. It is demonstrated that the proposed sensor is suitable for PD detection due to its high sensitivity, simple production process, and good resistance to environmental interference.

Metamaterial Inspired Resonators as Microwave Sensors: A Review

Metamaterial-based devices show properties like negative magnetic permeability and negative electrical permittivity, which are not found naturally. Due to their extraordinary sensitivity to nearby perturbations, metamaterial structures have recently emerged as highly desirable and effective techniques of detection. Wide dynamic range, multi-functionality, and simple design and production are a few benefits of metamaterial-based structures. The sensitivity and limit of detection for sensors based on metamaterials can be enhanced by properly altering the device parameters. With the inclusion of microfluidics in metamaterial-based sensors, the sensitivity, selectivity, and detection limit can also be improved. In this review, we have focused on the various meta-surfaces employed for sensing purposes. We have provided a brief introduction to the principle and working of sensors based on meta-surfaces. The main content of the paper is a detailed review of metamaterial-inspired microwave sensor device applications in different fields. These fields include applications in biological sensing, chemical and fuel sensing, physical sensing (includes temperature, strain, displacement, and thickness measurement), and non-destructive techniques for structural health monitoring.

Ambient and high temperature tensile behaviour of DLD-manufactured inconel 625/42C steel joint

In recent years, much attention has been directed towards multi-material systems produced using additive manufacturing technologies. Especially directed energy deposition-based systems provide a powerful tool for relatively simple production of components with controlled chemical composition in certain directions and locations. In this contribution, the potential of bimetallic material manufacturing based on the combination of nickel alloy Inconel 625 and 42C steel using direct laser deposition process was investigated. The monolithic single material blocks as well as graded blocks with alternate material deposition order were produced and investigated via light and scanning electron microscope. In addition, the miniaturized tensile tests at ambient and high temperatures were performed. It was observed that the character of two-material joint changed with the order of deposited materials. Based on the maps of chemical composition, it was shown that joint Inconel 625 to 42C was rather gradual, while 42C to Inconel 625 had sharp distribution of the main elements around the fusion line. The tensile test results demonstrated that the location of preferential failure was the joint itself in the case of gradual interface regardless of the test temperature. On the other hand, the sharp joint failed within Inconel 625 material at room temperature, while at elevated temperature the failure was observed in 42C steel region.

Multifunctional annulus fibrosus matrix prevents disc-related pain via inhibiting neuroinflammation and sensitization

Chronic low back pain mainly attributed to intervertebral disc (IVD) degeneration. Endogenous damage-associated molecular patterns (DAMPs) in the injured IVD, particularly mitochondria-derived nucleic acid molecules (CpG DNA), play a primary role in the inflammatory responses in macrophages. M1-type macrophages form a chronic inflammatory microenvironment by releasing pro-inflammatory factors and nerve growth factor (NGF) that induce nerve growth into the inner annulus fibrosus, resulting in persistent hyperalgesia. We fabricated an amphiphilic polycarbonate that naturally forms cationic nanoparticles (cNP) in aqueous solutions, with the hydrophobic core loaded with TrkA-IN-1, an antagonist against the NGF receptor (TrkA). The drug delivery nanoparticles were denoted as TI-cNP. TrkA-IN-1 and TI-cNP were added to the decellularized annulus fibrosus matrix (DAF) hydrogel to form hybrid hydrogels, denoted as TI-DAF and TI-cNP-DAF, respectively. As a result, TrkA-IN-1 showed a delayed release profile both in TI-DAF and TI-cNP-DAF. Each mole of cNP could bind approximately 3 mol of CpG DNA to inhibit inflammation. cNP-DAF and TI-cNP-DAF significantly inhibited the M1 phenotype induced by CpG DNA. TI-DAF and TI-cNP-DAF reduced neurite branching and axon length, and inhibited the expression of neurogenic mediators (CGRP and substance P) in the presence of NGF. Besides, TI-cNP-DAF relieved mechanical hyperalgesia, reduced CGRP and substance P expression in the dorsal root ganglion, and downregulated GFAP and c-FOS signaling in the spinal cord in the rat disc herniation model. Summarily, TI-cNP-DAF, a novel composite IVD hydrogel, efficiently mediated the inflammatory environment, inhibited nerve ingrowth and sensitization, and could be clinically applied for treating discogenic pain. Statement of significanceDiscogenic lower back pain, related to intervertebral disc degeneration (IDD), imposes a tremendous health and economic burden globally. M1-type macrophages release pro-inflammatory factors and nerve growth factor (NGF) that induce nerve growth into the inner annulus fibrosus, resulting in persistent hyperalgesia and discogenic pain. Reconstructing matrix integrity and modulating the inflammatory microenvironment are promising strategies for preventing the ingrowth and activation of neurites. The TI-cNP-DAF hydrogel recovers tissue integrity, alleviates inflammation, and delivers the TrkA antagonist to inhibit the activity of NGF, thus restraining hyperinnervation and nociceptive input. Due to its simple production process, injectability, and acellular strategy, the hydrogel is operable and holds great potential for treating discogenic lower back pain.

Peptide-Based Agents for Cancer Treatment: Current Applications and Future Directions.

Peptide-based strategies have received an enormous amount of attention because of their specificity and applicability. Their specificity and tumor-targeting ability are applied to diagnosis and treatment for cancer patients. In this review, we will summarize recent advancements and future perspectives on peptide-based strategies for cancer treatment. The literature search was conducted to identify relevant articles for peptide-based strategies for cancer treatment. It was performed using PubMed for articles in English until June 2023. Information on clinical trials was also obtained from ClinicalTrial.gov. Given that peptide-based strategies have several advantages such as targeted delivery to the diseased area, personalized designs, relatively small sizes, and simple production process, bioactive peptides having anti-cancer activities (anti-cancer peptides or ACPs) have been tested in pre-clinical settings and clinical trials. The capability of peptides for tumor targeting is essentially useful for peptide-drug conjugates (PDCs), diagnosis, and image-guided surgery. Immunomodulation with peptide vaccines has been extensively tested in clinical trials. Despite such advantages, FDA-approved peptide agents for solid cancer are still limited. This review will provide a detailed overview of current approaches, design strategies, routes of administration, and new technological advancements. We will highlight the success and limitations of peptide-based therapies for cancer treatment.

A Simple Kit for the Good-Manufacturing-Practice Production of [68Ga]Ga-EDTA.

Glomerular filtration rates for individual kidneys can be measured semi-quantitatively by a gamma camera using [99mTc]Tc-DTPA, with limited diagnostic accuracy. A more precise measurement can be performed on a PET/CT scanner using the radiotracer [68Ga]Ga-EDTA, which has been validated in animal studies. The purpose of this study was to develop an easy kit-based synthesis of [68Ga]Ga-EDTA that is compliant with good manufacturing practice (GMP) and applicable for human use. The production of the cold kit and its labeling were validated, as were the radiochemical purity measurement and analytical procedures for determining the Na2EDTA dihydrate content in the kits. In this study, we validated a GMP kit for the simple production of [68Ga]Ga-EDTA, with the intention of applicability for human use.

How does economic complexity improve energy efficiency? Mechanism discussion and empirical test.

Energy efficiency represents one of the best productive strategies to lessen the effects of global warming and climate change. Similarly, the manufacturing and export of a wide variety of high-tech, knowledge-based items like chemicals and machinery have significant effects on both economic growth and the environment. The main goal of this study is to examine the long-run effects of economic complexity on energy efficiency in 93 countries over the period from 1995 to 2015. The empirical outcomes reveal that economic complexity improves energy efficiency. Specifically, countries that produce and export a wide range of sophisticated products tend to enjoy higher levels of energy efficiency compared to their counterparts who export a limited range of simple products. Moreover, empirical findings suggest that economic growth and population density increase energy efficiency, while trade impedes it. Further empirical investigations from a mediation analysis revealed that about 63% and 38% of the effects of economic complexity on energy efficiency mediate through income inequality reduction and human capitalaccumulation, respectively. Based on these results, political leaders and governments are provided with solid reasons to pay more attention to improving their productive structures in order to promote energy efficiency and a green future.