Engineering Work Research Articles

An efficient energy management strategy based on heuristic dynamic programming specialized for hybrid electric unmanned delivery aerial vehicles

Large-sized unmanned delivery aerial vehicles (UDAVs) stand out as prominent vertical take-off and landing aircraft, benefiting from integrating a hybrid electric propulsion system (HEPS) to enhance the power-to-weight ratio. Despite this advancement, UDAVs encounter challenges regarding range limitations and the need for swift computational solutions. Addressing these issues necessitates a computationally efficient energy management strategy (EMS) that optimizes power distribution to properly plan engine working points, ultimately aimed at enhancing fuel economy to increase flight range. This study proposes a heuristic dynamic programming (HDP)-based EMS tailored for the HEPS of a large-sized UDAV. In this strategy, the HDP framework is adopted to improve computational efficiency by iteratively updating control variables. To account for the specific flight characteristics, a flight state identifier incorporating selected flight command flags applicable to UDAVs is designed. This identifier aids in predicting velocity changes for different flight states by amalgamating corresponding prediction networks into an integrated velocity prediction network (IVPN). Substituting the model network with IVPN in the HDP framework significantly enhances prediction accuracy and guides power distribution towards optimal results, signifying an efficient EMS specialized for UDAVs. The proposed strategy is evaluated against baseline strategies in designed flight scenarios, highlighting a remarkable 51.37% improvement in prediction accuracy, a noteworthy 6.04% reduction in equivalent fuel consumption, and an impressive 95.81% reduction in global computation time. Finally, the actual applicability of the proposed strategy is validated in a hardware-in-loop test. Consequently, the proposed strategy can provide theoretical support for the efficient energy management of diverse large-sized UDAVs.

Exploration of Streptomyces fradiae J1-021 as a Potential Host for the Heterologous Production of Spinosad.

Spinosad is a potent insecticide produced by Saccharopolyspora spinosa. However, it harbors certain limitations of a low growing rate and unfeasible genetic manipulation that can be overcome by adopting a superior platform, such as Streptomyces. Herein, we exploited the industrial tylosin-producing Streptomyces fradiae J1-021 for the heterologous production of spinosad. An engineered strain (HW01) with deletion of the tylosin biosynthetic gene cluster (BGC) was constructed and then transformed with the natural spinosad BGC. The distribution and expression levels of the tylosin BGC operons were assessed to construct a natural promoter library. The rate-limiting steps of spinosad biosynthesis were identified by analyzing the transcriptional expression of the spinosad biosynthetic genes. The stepwise engineering work involved the overexpression of the biosynthetic genes participating in rate-limiting pathways using strong promoters, affording an increase in spinosad production to 112.4 μg/L. These results demonstrate that strain HW01 has the potential to be used as a chassis for the heterologous production of polyketides.

Integrating perspectives from engineering ethics into the study of technology: A synthesis of research on critical cases

Ethics play a crucial role in the work of engineers, and therefore in everyone’s life, from the field of artificial intelligence ethics to the fields of environmental ethics and biomedical ethics. Analyzing critical technology case studies from the perspective of engineering ethics affords us the opportunity to understand if engineers acted ethically or not in a given situation, what they could have done otherwise, and what they should bear in mind for future case studies regarding ethics. In this article, at first, we draw upon primary and secondary sources in order to analyze two case studies that are of critical importance because, according to the engineers involved in them, it was likely they could have led to fatal accidents. Then, we offer engineering ethics perspectives into the studies. Studying engineering cases from an engineering ethics perspective is crucial for two reasons. First, engineers could have a more completed point of view regarding engineering ethics in order to understand how to act ethically during their work. Second, engineers and others (philosophers of technology, historians of technology, etc.), who analyze these cases in retrospect, could present a more adequate story that would be more useful for the engineers who are taught from it.

Role of Vanadium in Thermal and Hydrothermal Aging of a Commercial V2O5-WO3/TiO2 Monolith for Selective Catalytic Reduction of NOx: A Case Study

In recent years, increased attention to air pollutants such as NOx has led the scientific community to focus meaningfully on developing strategies for NOx reduction. Selective catalytic reduction of NOx by ammonia (NO SCR by NH3) is currently the main method to remove NOx from diesel engine exhaust emissions. The catalysts with typical V2O5-WO3/TiO2 (VWTi) composition are widely used in NH3-SCR for their high NOx conversion activity, low cost, and robustness, especially concerning sulfur poisoning. However, in real diesel engine working conditions, the thermal and hydrothermal aging of catalysts can occur after several hours of operation at high temperature, affecting the catalytic performance. In this study, the stability of a commercial VWTi monolith, self-supported and containing glass fibers and bentonite in its matrix, was investigated as a case study. In laboratory conditions, NO SCR tests were performed for 50 h in the range of 150 to 350 °C. Subsequently, the VWTi monolith was thermally and hydrothermally aged at 600 °C for 6 h. The thermal aging increased the NOx conversion, especially at low temperature (<250 °C), while the hydrothermal aging did not affect the SCR. The differences in NOx conversion before and after aging were associated with the change in vanadium and tungsten oxide surface coverage and with the reduction in the surface area of catalysts. In order to correlate the change in SCR activity with the modifications occurring after aging processes, the monolithic samples were characterized by several techniques, namely XRD, SSA and pore analysis, TPR, XPS, Raman, TGA and SEM/EDX.

Sustainable procurement of medical devices in an international context - Part 3

Background and Objectives This article is the third in a series of three manuscripts published in this journal. It aims to describe how sustainable procurement of medical devices (MDs) can be implemented in operational projects in the context of developing countries. It also further details how the biomedical/clinical engineer lead (BCEL) in charge of technical support during the MD procurement process can apply sustainability principles and concepts of value-based procurement. Material and Methods Based on the authors’ experience of more than 20 years in procurement projects and implementation of MDs, the role of the BCEL will be developed from a theoretical point of view with the description of the second and third pillars of a sustainable purchase following the needs assessment: the assessment of existing conditions along with local capacities and the evaluation of the use conditions during the lifetime of the medical equipment. The application of these principles in operational projects will be further discussed by analyzing literature and lessons learned from projects implemented in developing countries. Results/Proposal The BCEL has a key role in the sustainable procurement of MDs to design the technical specifications of the goods, related services, and post-sales conditions to maximize the benefit of the investment. As the specialist can analyze the local existing conditions and capacities while ensuring efficient use of the MDs during their lifespan, they can contribute to a sustainable implementation of MDs in developing countries. The BCEL shall also be able to analyze the local and international markets to find all possible technological solutions that meet the needs, local conditions, and capacities and ensure quality use during the lifespan of the purchased MD. The BCEL shall have competencies in identifying all the risks related to the use of the MD from the safety risks linked to its installation, use, and maintenance to the sustainability risks linked to obtaining the conditions that guarantee the use of the device and maintaining them as long as possible. Examples of these conditions include the presence of qualified and trained users, availability of maintenance and consumable budgets, availability and maintenance of infrastructure conditions (access, electrical power, water, drainage, medical gasses, etc.), and last but not least, presence of patients requiring a diagnosis or treatment using the purchased MD who were identified during the evaluation of the first pillar: a sound needs assessment. Conclusion As an evolution of the BCEL’s traditional biomedical and clinical engineering work, he/she shall assume the responsibility to guarantee the sustainability of the MD purchase. This quality assurance and control role is achieved by a sound theoretical background knowledge based on the three sustainable procurement pillars: the needs, existing and lifetime use conditions assessments, the analysis of the local and international markets, and a broad understanding of sustainability risks.

Hörspiel in the lab: The politics of interdisciplinary radio research in Germany (1928–45)

This article focuses on the establishment of new laboratories for radio research in Germany between 1928 and 1945, whereby the new discipline of radio studies and the collective work of artists, engineers and humanities scholars crucially advanced the development of the German Hörspiel (radio play). In turn, the embedding of the Hörspiel in these new ‘radio labs’ serves as an instructive prism for understanding the interdisciplinary and simultaneously highly political nature of these endeavours. Examining three case studies for radio research in this period, in Berlin, Leipzig and Freiburg, the article demonstrates how each adapted the laboratory culture of the engineering sciences to the needs of research in the humanities and their relationship to changing political conditions during the Weimar and National Socialist periods. It highlights a forgotten chapter in radio history and humanities research, particularly amidst the current enthusiasm for ‘humanities labs’ in the era of digital humanities.

Геоінформаційна система інженерних мереж та комунікацій морського торгового порту

The work is devoted to researching the process of development, implementation and operation of the geoinformation system of engineering networks and communications (GISIS) in the Odesa Sea Trade Port. The beginning of the development of the system began more than twenty years ago. The beginning of the works was preceded by the stage of pre-project studies, the result of which were the technical tasks for the implementation of the works and the project of the structure of information support. The work was carried out in stages, which corresponded to a separate territory and type of work. The purpose of this work is to research the processes of performing field and camera geodetic, photogrammetric, cartographic works, designing and creating a geoinformation database, selecting and adapting specialized geoinformation software, operating and supporting the system during the full life cycle of the geoinformation system. The methodology mainly corresponds to the following algorithm of work performance. At the stage of preliminary design studies: – collection and analysis of data on the exchange of cartographic and analytical information between external organizations, – collection and analysis of data on the exchange of cartographic and analytical information within the enterprise, primarily between engineering services, – description of the existing document circulation system with cartographic and analytical information, – a description of the shortcomings of the existing document management system, – determination of requirements for geo-information software and justification of the configuration of the geo-information software package and its architecture. At the stage of field work: – construction of a shooting justification and definition of data for communication with other coordinate systems, – reconnaissance on the territory of performance of works. Planning field work. – execution of topographical and geodetic works for the purpose of building or updating 1:500, 1:2000 scale plans. Construction of outlines. – performance of engineering and geodetic works for the study of underground communications in order to design the sections of wells and other engineering nodes. At the stage of design (camera works): – based on outlines and electronic survey protocols, development or correction of 1:500, 1:2000 scale plans using geoinformation software. – based on outlines, photofixation materials, construction of diagrams of sections of wells and other engineering nodes in electronic form. – formation of a geo-informational database of the object on the territory of execution of works. – debugging the project in the environment of geoinformation software. – coordination of the project with the engineering services of the enterprise and external organizations. – commissioning the developed project to the customer. Scientific novelty and practical significance – for the first time, research and development of the methodology of creation and support at all stages of the life cycle of the geoinformation system of engineering networks and communications of a large seaport was carried out. The methodology was developed for a long time during the entire life cycle of the system. The methodology was used by other ports and large industrial enterprises.

Reimagining engineering practice through a global responsibility competency compass

A study by the Institution of Engineering and Technology indicates a perilous skills shortage: only 7% of engineering companies in the UK with a sustainability strategy say they have the skills needed to fulfil it. This paper presents the work of Engineers Without Borders UK in tackling the skills gap in the engineering sector, through the global responsibility competency compass. Developed with the support of the Royal Academy of Engineering and endorsed by the Engineering Council, the compass aims to support practitioners from multiple disciplines working in engineering towards the capabilities they will need to stay relevant in the context of today's challenges. It provides users with practical ways to develop themselves so that they can respond effectively to this age's complexity, uncertainty and challenges. Engineers are uniquely placed to tackle global challenges, improve quality of life, protect the environment and increase resilience to risk. Furthermore, the sector is being called on to develop and apply the knowledge, skills and behaviours that reflect the broader impacts that its decisions have on society and the environment. This paper also discusses the role and relevance of global responsibility and the compass to the application of coastal defence as an example.

Enhancing Arabic offensive language detection with BERT-BiGRU model

With the advent of Web 2.0, various platforms and tools have been developed to allow internet users to express their opinions and thoughts on diverse topics and occurrences. Nevertheless, certain users misuse these platforms by sharing hateful and offensive speeches, which has a negative impact on the mental health of internet society. Thus, the detection of offensive language has become an active area of research in the field of natural language processing. Rapidly detecting offensive language on the internet and preventing it from spreading is of great practical significance in reducing cyberbullying and self-harm behaviors. Despite the crucial importance of this task, limited work has been done in this field for nonEnglish languages such as Arabic. Therefore, in this paper, we aim to improve the results of Arabic offensive language detection without the need for laborious preprocessing or feature engineering work. To achieve this, we combine the bidirectional encoder representations from transformers (BERT) model model with a bidirectional gated recurrent unit (BiGRU) layer to further enhance the extracted context and semantic features. The experiments were conducted on the Arabic dataset provided by the SemEval 2020 Task 12. The evaluation results show the effectiveness of our model compared to the baseline and related work models by achieving a macro F1- score of 93.16%.

Female Pre-Service Elementary Teachers’ Conceptualizations of Engineers and Engineering: A Critical Consciousness Perspective

ABSTRACT The purpose of this study was to address issues of potential gender bias in pre-service elementary teachers’ conceptions of engineers and engineering using Freire’s (2018) Critical Consciousness perspective. By identifying the biasness as causal and structural attributions, the study also aimed to construct a critical pedagogy framework for future pre-service elementary teachers to reflect on and to radically reimagine and transform potential gender bias in their conceptions of engineers and engineering. Drawings of engineers and narratives of drawings from 115 pre-service elementary teachers served as data. The analysis comprised a two-step process: (1) identification of patterns through an inductive analysis of the data; and (2) analysis of patterns from the Critical Consciousness perspective to generate themes. Themes included: (1) depictions of male engineers being afforded privileges of having innate abilities to perform engineering from the standpoint of strong disciplinary backgrounds in mathematics and science while depictions of female engineers being afforded privileges of having innate abilities to perform engineering from the standpoint of computing, designing, and coding. (2) depictions of male engineers’ “work” of engineering being related to tangible outcomes like physical products, and (3) depictions of male engineers as authority figures and having the ability to lead the work of engineering. The critical pedagogical framework constructed is a step toward developing a tool for critically reflecting, and radically imagining, reimagining, and thus transforming inequities inherent in future pre-service elementary teachers’ conceptualizations of engineers and engineering.

The Mechanical and Self-Sensing Properties of Carbon Fiber- and Polypropylene Fiber-Reinforced Engineered Cementitious Composites Utilizing Environmentally Friendly Glass Aggregate

In order to facilitate waste glass recycling and enable the monitoring of concrete structures, this study prepares a new type of self-sensing engineered cementitious composite (ECC) via the use of glass sand instead of silica sand. The health monitoring of a concrete structure is achieved through the addition of polypropylene (PP) fibers to enhance the flexural toughness of concrete, and adding carbon fibers (CFs) to make the concrete self aware, enabling it to sense the load changes and structural damage. The fiber dosage of ECC is optimized to analyze the effects of different fiber types and dosages on the mechanical and self-sensing properties of concrete. The results show that the hybrid fibers produce a good synergistic effect on mechanical properties, and the presence of excess fibers causes the mechanical properties of concrete to deteriorate. The critical fiber volume fraction required for the strain hardening of PP ranges from 0.75% vol to 1% vol. At different PP dosages, the CF dosage shows a positive correlation with the initial crack strength. By analyzing the effect of varied curing times and CF doping on the initial resistivity, it is found that the threshold value of CF conductivity is 0.7% vol. The role of CFs in the flexural sensitivity and pressure sensitivity tests is explained from the perspective of fiber distribution, and the fiber distribution theory is verified with scanning electron microscopy (SEM). The optimal level of CF doping for flexural sensitivity and pressure sensitivity is determined to be 1.1% vol and 0.7% vol via the use of self-sensing performance tests, respectively. An increase in PP fiber doping leads to a decrease in the initial resistivity and self-sensing properties of the material. The results of this research provide guidance regarding how to determine the optimal fiber dosage flexibly for different engineering works.

Connecting the work of scientists, engineers and industry

Connecting the work of scientists, engineers and industry

Deinstitutionalized Careers: Intersectionality of Gender Pay Gap among Women Knowledge Workers

The purpose of this study is to explore women knowledge workers’ experiences of the intersectionality of the gender pay gap and to scrutinize the reasons behind gender pay gap. The study problematizes the gender pay gap phenomenon by using intersectionality theory. The study describes how the gender pay gap varies based on ethnical differences besides being women and reveals how this situation deinstitutionalizes women’s careers. The study utilized a descriptive qualitative research design employing thematic analysis conducted in Germany and Türkiye with a purposively selected sample of participants. The study’s empirical material was generated through semi-structured interviews with women knowledge workers who differ in ethnicity and generally work in science, technology, engineering, and mathematics (STEM) fields. The study’s findings indicated that ethnicity should be considered among other intersectional factors to analyze the gender pay gap comprehensively. The reasons behind the gender pay gap are found to be the lack of transparency in the workplace, gender-based occupational segregation, culture, the glass ceiling, the existence of male-dominated informal communication channels, and the fact that women workers are more easily preferred in organizational downsizing initiatives.

UNLEASHING WEBSITE'S POTENTIAL WITH SEARCH ENGINE OPTIMIZATION STRATE

Search engine is a system software that filled with hyperlinks which is used to identify the websites and the users need and their queries. Search engine are super powered websites that help you find information on internet. its like having the personal assistant that can find anything you want to know! Google is one of the most popular search Engine, but there are others like Bing and yahoo too. Whenever you having a Burning Questions, just fire up a search engine and let it do the work for you. Search engine makes the manwomen lazier. There are 3 basic stages or step to how search engine works which are CRAWL, INDEXING and RETREVAL. Search engine mainly speak about Search Engine Marketing (SEM) and Search Engine Optimization (SEO). In search engine GOOGLE provides about 149 languages and APPLE’s websites covers and translate into 126 different languages. Coming to 2024 CHATGPT is most famous and used search engine. Keywords: Search Engine, Optimization, Website

The analysis of operation and failures of a power plant on high-speed vessels with semi-submersible propellers

Over the past century, shipbuilding has been closely linked to solving the most acute problem of increasing the speed of ships. Builders of high-speed vessels habitually justify this struggle for speed in connection with the requirements of the modern market. In Russia, as well as all over the world, there is a need for modern, high-speed, maneuverable and economical vessels. To meet this need, Almaz Central Design Bureau has developed, the Rybinsk Vimpel Plant has launched a high-speed vessel with semi-submersible propellers of project 12150 "Mongoose". Currently, about 75 ships have been launched [1]. This article analyzes the work of foreign and domestic engines accumulated during the operation of high-speed engines MTU 10V2000M93 (manufactured in Germany), ZVEZDA M470MK-M3 (manufactured in Russia) installed on high-speed vessels of project 12150. In particular, information on the most characteristic failures of the components of the main power plants and the propulsion system as a whole, as well as on the possible causes of the occurrence and development of typical engine failures installed on these high-speed vessels, which allow us to assess the advantages and disadvantages of the power plant used.

Information engine with feedback delay based on a two-level system.

An information engine based on a two-level system in contact with a thermal reservoir is studied analytically. The model incorporates delay time between the measurement of the state of the system and the feedback. The engine efficiency and work extracted per cycle are studied as a function of delay time and energy spacing between the two levels. It is found that the range of delay time over which one can extract work from the information engine increases with temperature. For delay times comparable to the relaxation time, efficiency and work per cycle are maxima when k_{B}T≈2U_{0}, the energy difference between the levels. The generalized Jarzynski equality and the generalized integral fluctuation theorem are explicitly verified for the model. The results from the model are compared with the simulation results for a feedback engine based on a particle moving in a one-dimensional square potential. The variation of efficiency, work per cycle, and efficacy with the delay time is compared using relaxation time in the two-level model as the fitting parameter, leading to a good fit.

Step-rate-test as one of the strategies for managing formation water injection. Design and monitoring

The construction of a produced water management (PWM) system relies on a Step-rate-test strategy that integrates a novel technology for treating the bottomhole formation zone and adjacent fractures resulting from prior hydraulic fracturing. Step-rate-test technology is considered more environmentally friendly than hydraulic fracturing for several reasons. It doesn't require crosslinkers or proppants, and there is no discharge of liquids or other reagents onto the terrain or into water basins. This article discusses technical approaches to solving field service problems in injection wells. One of the strategies for managing produced water injection is Step-rate-test, which is considered the best choice in these operations. This strategy can also be used to solve the problem of disposing of excess fluid or waste after hydraulic fracturing. Advances in modelling, operation, monitoring, and evaluation provide the basis for minimising costs and preserving the environment. The connection between the object of work and the engineering works is established through quality targets and pumping requirements. Field example, such as Tevlinsko-Russkinskoye and Yuzhno-Yagunskoye, and results of data mining of them, demonstrate the significant impact of data differences on site selection. Field data indicates that injectivity decreases in matrix injection structures despite the injection of prepared fluid. It is acceptable to inject the fluid without prior preparation, provided that there is no well pad pump station, pipe end phase divider or similar equipment. The majority of rock structures become fractured during fluid injection, which affects the selection of technical equipment for the process. This article evaluates the propagation of fractures during the injection of prepared and unprepared fluids and their impact on well performance.

Insights into engineering work for future surveyors

The article describes the conduct of geodetic work on engineering work by young specialists entering this field, and provides final conclusions and proposals for the work performed.

Consolidation of a New Organizational and Production Paradigm in Software Development Projects

This article discusses the current process of consolidation a new organizational and production paradigm in software development projects and digital services in Europe and Russia. This paradigm combines the possibilities of completely remote work of engineers in projects with deep adaptation of production and management processes (internal automation, communications visualization, risk management, etc.). To solve the actual scientific and practical task of determining the main properties of the new paradigm in the IT industry, industry studies for 2020-2023 were summarized and considered the sequence of influencing factors: from the use of geographically distributed development in software projects since the end of the last century to modern trends in workflow virtualization under the influence of the COVID pandemic and the use of artificial intelligence in software development. The paper also pays attention to the role and reasons for the emergence of a "hybrid" model for organizing the work of IT companies, when a team works together in the office several days a week, and several outside it. The results of the analyzed studies confirm that in 2023, fully remote work and the "hybrid" model are less and less dependent on the risks of a pandemic, are economically successful when used in the IT industry and create a completely new reality in the competitive struggle in the global IT market.

Legal Education for Civil Engineers in the Context of Bangladesh

As difficult as the work of a civil engineer is, so too are the current regulatory requirements for building projects. However, it is often believed that legal expertise and knowledge are not at all required for the field of civil engineering. But legal issues related to neighboring, environmental, and professional engineering laws, as well as civil and public construction legislation, are frequently raised over the course of construction projects. Though civil engineers are less involved in legal aspects of building than architects and construction managers are. However, several laws and regulations also have an impact on the civil engineers' daily work lives. To find out the necessity if legal education for Civil Engineers several syllabuses of Civil Engineering department of different universities have been studied along with a survey to project engineers has been done to find the usage of Legal aspects. According to the survey report and analysis of syllabuses it’s being found that not all but some vital legal educational portions are used in Civil Engineering works. To prevent legal problems that could lead to a financial or personal disadvantage, it is essential to have a basic awareness of the legal system of one's native country, the legal connections in building projects, and pertinent legal sources. This paper indicates the need for legal education for civil engineers in Bangladesh. It also indicated the global need to educated civil engineers in law that is related to them.