bluuebunny/crossref_metadata_2025 huggingface dataset:
Globalization and decarbonization: Changing strategies of global oil and gas companies
Authors: Guo Yue , Yang Yu , Bradshaw Michael , Wang Chang , Blondeel Mathieu
Published: June 2023

Oil and gas (O&G) companies, as key players in the contemporary global energy landscape, have evolved within the context of a dynamic interaction between states and markets. However, their role is being transformed radically by two successive “global shifts”: economic globalization—driving energy demand growth patterns—and climate change—driving energy system transformation and decarbonization, both of which require them to reconsider their business strategies. Using an interdisciplinary lens that draws on human geography, strategy and international business, and international political economy, we propose an integrated conceptual framework for two periods—the 1990s–early 2010s and the post‐Paris Agreement era—to explore the nature of strategic responses by O&G companies to these global economic and environmental shifts. We illustrate the linkage of O&G companies' two strategies of (re‐)globalization and decarbonization by the aspects of production, finance, and knowledge as internal structures. Energy security is one of the priorities in the macro external environment. It is becoming increasingly difficult for O&G companies to deal with current dilemmas: climate goals require a significant reduction in fossil fuel production and consumption, and pressures from governments, nongovernmental organizations, and investors threaten the long‐term survival of O&G companies, while fossil fuel demand will remain high in the short to medium term. At the same time, the post‐pandemic recovery and Russia's war in Ukraine are resulting in a re‐assessment of the benefits of unfettered globalization. Therefore, global O&G companies face dual challenges in the new era of (re‐)globalization and decarbonization and need to make changes to ensure their future viability.

This article is categorized under:

The Carbon Economy and Climate Mitigation > Decarbonizing Energy and/or Reducing Demand
Additive problems with almost prime squares
Authors: Blomer Valentin , Grimmelt Lasse , Li Junxian , Rydin Myerson Simon L.
Published: June 2023

We show that every sufficiently large integer is a sum of a prime and two almost prime squares, and also a sum of a smooth number and two almost prime squares. The number of such representations is of the expected order of magnitude. We likewise treat representations of shifted primes $$p-1$$

p
-
1

as sums of two almost prime squares. The methods involve a combination of analytic, automorphic and algebraic arguments to handle representations by restricted binary quadratic forms with a high degree of uniformity.
First skeletochronological analysis on loggerhead yearlings (Caretta caretta) in the Canary Islands
Authors: Usategui-Martín Alejandro , Valverde Roldán A. , Ostiategui-Francia Patricia , Fariñas-Bermejo A. , Paz-Sánchez Yania , Liria-Loza Ana
Published: June 2023

Knowing the age of individuals in a population is crucial to devise appropriate conservation strategies, especially on endangered long-lived species such as sea turtles. Sea turtles do not have external morphologic characters that indicate their age; therefore, age has been estimated by indirect methods such as biometric measurements or skeletochronological analysis. Previous skeletochronological studies have determined that sea turtle age can be estimated with skeletal growth marks (GMs) produced by annual seasonality. This study focused on the skeletochronological analysis of known-age loggerheads reared under seminatural conditions, showing that sea turtles kept under natural photoperiod and seawater temperature seasonality and fed periodically, did not present visible GMs. However, the animals suffering health problems affecting their growth did exhibit GMs. This suggests that skeletochronological studies in sea turtles must be taken with caution at least at early life stages and for the northeast Atlantic loggerhead population. Additionally, this study showed that seawater temperature seasonality strongly influences sea turtles’ growth rates.
Ward-level leadership quality and prospective low-back pain of eldercare workers: do resident handlings mediate the association?
Authors: Januario Leticia Bergamin , Mathiassen Svend Erik , Holtermann Andreas , Bergström Gunnar , Stevens Matthew Leigh , Rugulies Reiner , Hallman David
Published: June 2023

Objective

We investigated the extent to which ward-level leadership quality was associated with prospective low-back pain among eldercare workers, and how this association was mediated by observed resident handlings.

Methods

530 Danish eldercare workers, employed in 121 wards, distributed across 20 nursing homes were evaluated. At baseline, leadership quality was measured using the Copenhagen Psychosocial Questionnaire, and resident handlings [handlings per shift, handlings not using assistive devices, handlings done alone, interruptions to handlings, impediments to handlings] were assessed using observations. Frequency and intensity of low-back pain was assessed monthly during the following year. All variables were averaged for each ward. We used ordinary least squares regressions to examine direct effects of leadership on low-back pain and indirect effects through handlings, using PROCESS-macro for SPSS.

Results

After adjustments for low-back pain at baseline, type of ward, staff ratio (i.e., number of workers divided by number of residents) and proportion of devices not in place, leadership quality showed no effect on prospective low-back pain frequency (β = 0.01 [− 0.05:0.07]) and a small beneficial effect on pain intensity (β = − 0.02 [− 0.04:0.00]). Resident handlings did not mediate the association between leadership quality and frequency or intensity of low-back pain.

Conclusions

Good leadership quality was associated with a small decrease in prospective low-back pain intensity, but resident handlings did not seem to play a mediating role, although better ward-level leadership quality contributed to fewer workplace-observed resident handlings without assistance. Potentially, organizational factors, such as type of ward and staff ratio, may have a greater influence on handlings and low-back pain than leadership quality per se among eldercare workers.
Prognostic differences in grading and metastatic lymph node pattern in patients with small bowel neuroendocrine tumors
Authors: Reinhard Lisa , Mogl Martina T. , Benz Fabian , Dukaczewska Agata , Butz Frederike , Dobrindt Eva Maria , Tacke Frank , Pratschke Johann , Goretzki Peter E. , Jann Henning
Published: June 2023

Purpose

Neuroendocrine tumors of the small
intestine (si-NET) describe a heterogenous group of neoplasms. Based on the Ki67 proliferation index si-NET are divided into G1 (Ki67 < 2%), G2 (Ki67 3–20%) and rarely G3 (Ki67 > 20%) tumors. However, few studies evaluate the impact of tumor grading on prognosis in si-NET. Moreover, si-NET can form distinct lymphatic spread patterns to the mesenteric root, aortocaval lymph nodes, and distant organs. This study aims to identify prognostic factors within the lymphatic spread patterns and grading.

Methods

Demographic, pathological, and surgical data of 208 (90 male, 118 female) individuals with si-NETs treated at Charité University Medicine Berlin between 2010 and 2020 were analyzed retrospectively.

Results

A total of 113 (54.5%) specimens were defined as G1 and 93 (44.7%) as G2 tumors. Interestingly, splitting the G2 group in two subgroups: G2 low (Ki67 3–9%) and G2 high (Ki67 10–20%), displayed significant differences in overall survival (OS) (p = 0.008) and progression free survival (PFS) (p = 0.004) between these subgroups. Remission after surgery was less often achieved in patients with higher Ki67 index (> 10%). Lymph node metastases (N +) were present in 174 (83.6%) patients. Patients with isolated locoregional disease showed better PFS and OS in comparison to patients with additional aortocaval and distant lymph node metastases.

Conclusion

Lymphatic spread pattern influences patient outcome. In G2 tumors, low and high grading shows heterogenous outcome in OS and PFS. Differentiation within this group might impact follow-up, adjuvant treatment, and surgical strategy.
Magnetic resonance imaging in naso-oropharyngeal carcinoma: role of texture analysis in the assessment of response to radiochemotherapy, a preliminary study
Authors: Bicci Eleonora , Nardi Cosimo , Calamandrei Leonardo , Barcali Eleonora , Pietragalla Michele , Calistri Linda , Desideri Isacco , Mungai Francesco , Bonasera Luigi , Miele Vittorio
Published: June 2023

Objective

Identifying MRI texture parameters able to distinguish inflammation, fibrosis, and residual cancer in patients with naso-oropharynx carcinoma after radiochemotherapy (RT-CHT).

Material and methods

In this single-centre, observational, retrospective study, texture analysis was performed on ADC maps and post-gadolinium T1 images of patients with histological diagnosis of naso-oropharyngeal carcinoma treated with RT-CHT. An initial cohort of 99 patients was selected; 57 of them were later excluded. The final cohort of 42 patients was divided into 3 groups (inflammation, fibrosis, and residual cancer) according to MRI, 18F-FDG-PET/CT performed 3–4 months after RT-CHT, and biopsy. Pre-RT-CHT lesions and the corresponding anatomic area post-RT-CHT were segmented with 3D slicer software from which 107 textural features were derived. T-Student and Wilcoxon signed-rank tests were performed, and features with p-value < 0.01 were considered statistically significant. Cut-off values—obtained by ROC curves—to discriminate post-RT-CHT non-tumoural changes from residual cancer were calculated for the parameters statistically associated to the diseased status at follow-up.

Results

Two features—Energy and Grey Level Non-Uniformity—were statistically significant on T1 images in the comparison between ‘positive’ (residual cancer) and ‘negative’ patients (inflammation and fibrosis). Energy was also found to be statistically significant in both patients with fibrosis and residual cancer. Grey Level Non-Uniformity was significant in the differentiation between residual cancer and inflammation. Five features were statistically significant on ADC maps in the differentiation between ‘positive’ and ‘negative’ patients. The reduction in values of such features between pre- and post-RT-CHT was correlated with a good response to therapy.

Conclusions

Texture analysis on post-gadolinium T1 images and ADC maps can differentiate residual cancer from fibrosis and inflammation in early follow-up of naso-oropharyngeal carcinoma treated with RT-CHT.
Influence of Feedstock and Thermal Spray Process on the Phase Composition of Alumina Coatings and Their Sliding Wear
Authors: Ali Omar , Ahmed Rehan , Toma Filofteia-Laura , Berger Lutz-Michael , Matthey Björn , Faisal Nadimul , Ahmed Khalid
Published: June 2023

Suspension thermal spraying is an emerging coating technology that enables the deposition of dense-structured ceramic coatings. As wear resistance is a main application field of alumina (Al2O3) coatings, this study aimed to evaluate the dry reciprocating sliding wear resistance of suspension sprayed high velocity oxy-fuel (S-HVOF) alumina coatings and to compare it with atmospheric plasma sprayed (APS) and HVOF coatings. Coatings were analyzed in the as-sprayed state and post-treated at 910 °C (hot isostatically pressed, HIPed) conditions. Wear tests were conducted using a tribometer, following the ASTM G133-02 standard and a sintered WC-6 wt.% Co ball as the counterbody. Coating characterization was done using scanning electron microscopy, x-ray diffraction and nanoindentation technique. Results indicate that the HVOF, HVOF-HIP and S-HVOF coatings had a high α-Al2O3 content, whereas the APS and APS-HIP coatings had a high γ-phase content together with high porosity. Sliding wear resistance was an order of magnitude higher for the S-HVOF and HVOF coatings than the APS and APS-HIPed coatings. This difference in wear performance was attributed to the high nanohardness, elastic modulus, dense microstructure and relatively high α-Al2O3 content in the HVOF, S-HVOF and HVOF-HIP coatings. Results are discussed in terms of the wear mechanism and structure-property relationship.
Development and Implementation of an Online Education Program on Advanced Breast Cancer for European Cancer Nurses: ABC4Nurses Project: a Brief Report
Authors: Dowling Maura , Shewbridge Amanda , Ryan Claire , Clancy Caroline , Meade Elizabeth , Sheehan Sarah , de La Serna Celia Díez De Los Rios , Bağçivan Gülcan , Kotronoulas Grigorios , Erdem Sema , Aroyo Violet , Radia Bhaveet , Wiseman Theresa , Drury Amanda
Published: June 2023

Breast cancer is now the most commonly diagnosed cancer worldwide. Approximately 30% of those who present with early breast cancer later develop advanced breast cancer (ABC). Additionally, approximately 6% have advanced breast cancer at diagnosis. New treatment options result in an extended lifespan dominated by cycles of deterioration and stable disease. Specialist nurse knowledge is key to multidisciplinary care of people with ABC; however, access to education on ABC for nurses is not universally available in Europe. This paper describes the development and implementation of an online bespoke program on ABC care for specialist and generalist nurses in Europe. The project team is affiliated with the European Oncology Nurses Society (EONS) and comprises specialist breast cancer nurses, oncology nurse academics and breast cancer advocates associated with EUROPA DONNA Turkey, an independent non-profit European breast cancer organisation. The program development involved (1) a systematic review of ABC educational resources for cancer nurses; (2) a modified four-round Delphi study to seek agreement on curriculum content and (3) curriculum development, conversion to an interactive online platform and translation into four European languages. The program evaluation will be guided by Kirkpatrick’s framework. The phases described in this short report could guide others involved in developing bespoke cancer education programs.
Peacock patterns and resurgence in complex Chern–Simons theory
Authors: Garoufalidis Stavros , Gu Jie , Mariño Marcos
Published: June 2023

The partition function of complex Chern–Simons theory on a 3-manifold with torus boundary reduces to a finite-dimensional state-integral which is a holomorphic function of a complexified Planck’s constant$$\tau $$τin the complex cut plane and an entire function of a complex parameteru. This gives rise to a vector of factorially divergent perturbative formal power series whose Stokes rays form a peacock-like pattern in the complex plane. We conjecture that these perturbative series are resurgent, their trans-series involve two non-perturbative variables, their Stokes automorphism satisfies a unique factorization property and that it is given explicitly in terms of a fundamental matrix solution to a (dual) linearq-difference equation. We further conjecture that a distinguished entry of the Stokes automorphism matrix is the 3D-index of Dimofte–Gaiotto–Gukov. We provide proofs of our statements regarding theq-difference equations and their properties of their fundamental solutions and illustrate our conjectures regarding the Stokes matrices with numerical calculations for the two simplest hyperbolic$$\textbf{4}_1$$41and$$\textbf{5}_{2}$$52knots.
Complex interval-valued intuitionistic fuzzy decision support system with application to COVID-19 healthcare facilities
Authors: Khan Muhammad Sajjad Ali , Jan Saeed Ullah , Jan Rahim , Senapati Tapan , Moslem Sarbast
Published: June 2023

The complex interval-valued intuitionistic fuzzy set (CIIFS), as an extension of the complex intuitionistic fuzzy set (CIFS), is one of the better tools for dealing with time-periodic information in a single set of two-dimensional information. So, this paper makes some new operators based on Aczel-Alsina’s t-norm and t-conorm in the CIIFS environment. First, some Aczel-Alsina t-norm and t-conorm operational laws are defined for complex interval-valued intuitionistic fuzzy numbers (CIIFNs). Then, using the proposed operational laws, Aczel-Alsina The operators Complex interval-valued intuitionistic Aczel-Alsina weighted average (CIIFAAWA), Complex interval-valued intuitionistic Aczel-Alsina weighted geometric (CIIFAAWG), Complex interval-valued intuitionistic Aczel-Alsina ordered weighted average (CIIFAAOWA), and Complex interval-valued intuitionistic Aczel-Alsina ordered weighted geometric (CIIFAAOWG) are developed. Further, some properties of the proposed operators are discussed and investigated in detail. A group decision-making method is also suggested based on developed operators in the CIIFS environment. The proposed operators are more adaptable and give more accurate results than existing ones. Furthermore, a multi-criteria decision-making technique is developed based on the proposed operators. A decision-making problem for healthcare facilities in public hospitals is provided to demonstrate the benefits and applicability of the proposed method. Finally, a comparative study is also investigated using the existing methods.
Wrecked All Over the Place: The Identification of Disarticulated Context-Free Ship Remains from the Gold Coast in Queensland, Australia
Authors: van Duivenvoorde Wendy , Davison Lauren , Polzer Mark , de Ruyter Mick , Bennett Kurt , Nutley David , Waterson Paddy
Published: June 2023

This article shows that it is possible to identify a vessel from disarticulated ship remains missing their original depositional context. By studying a dispersed collection of timbers, fasteners, and hull sheathing from a previously unidentified shipwreck on the Gold Coast, Australia, the authors were able to identify the remains as most likely from the colonial schooner Heroine. In this instance there were several possible identifications for the disarticulated ship remains, so historical research, detailed artifact recording, and timber and metal analyses were used to study the ship elements. The results showed a range of timbers preferred by New South Wales shipwrights and copper sheathing of a datable metal composition, generating new knowledge of the material selection and techniques used in Australian colonial shipbuilding in general. While disarticulated or context-free shipwreck remains are often only able to provide a generic cultural or type affiliation, this study shows that through detailed analysis it is possible to ascribe a ship’s name to the dispersed structural elements.
Association of children’s behavioral changes and parent–child relationship with parental anxiety under confinement during COVID-19 pandemic: a cross-sectional study
Authors: Xu Yingxia , Zheng Juan , Yan Xiaofang , Huang Jitian , Xu Guifeng , Liu Buyun , Yang Wenhan
Published: June 2023

Objective

Coronavirus Disease-19 (COVID-19) has become a global pandemic, and mental health of children and parents are affected by confinement in home. Since the outbreak of COVID-19 is still global pandemic currently, it is important to examine how the changes of children’s behaviors and parent–child relationship affect parental anxiety during this difficult time.

Methods

A cross-sectional online investigation was conducted with snowball sampling to collect the information about the behavioral changes of children and the anxiety of parents from February 23 to March 3, 2020. 642 participants who had children aged 3–17 years included in this study. Information about behavioral change of children was reported by parents with a questionnaire, parental anxiety was assessed with Self-rating Anxiety Scale (SAS, Chinese Version).

Results

Among children’s behaviors, decreased time of outdoor activity was associated with a lower odds of parental anxiety, with an adjusted odds ratios (ORs) of 0.31 (95% CI, 0.11–0.87). Parents’ satisfaction with children's behaviors was associated with a lower odds of parental anxiety (ORs, 0.13; 95% CI, 0.05–0.35). In addition, we observed a significant association of worse behavioral performance and worse family relationship with anxiety among parents with the adjusted ORs of 2.78 (95% CI, 1.35–5.73), and 2.67 (95% CI, 1.13–6.32), respectively.

Conclusion

Under COVID-19 outbreak in China, changes in children’s behavioral and family relationship were associated with parental anxiety. Our finding suggested that family mental health support and promotion should consider the children’s behavioral regulation and parent–child relationship as essential components.
Impact of Information on Attitudes Regarding Greenhouse Lighting Externality Regulation
Authors: Daniel Jared , Secor William , Campbell Benjamin
Published: June 2023

As food producers face increasing costs, many greenhouse growers are turning to controlled environment agriculture. The use of light-emitting diode (LED) supplemental lighting systems may increase a producer’s profitability, but it also comes with a unique set of externalities. Using an online survey, we found that showing images of light pollution from supplemental LED lighting sources facilitated respondents to want more regulation with state government being the desired regulator. Several significant factors influenced survey respondents’ posttreatment preference outcomes for different levels of regulation and regulators including demographic characteristics as well as initial attitudes toward LED lighting systems before treatment.
Explaining Disaster and Pandemic Preparedness at the Nexus of Personal Resilience and Social Vulnerability: An Exploratory Study
Authors: Ferreira Regardt , Cannon Clare EB , Buttell Fred , Davidson Tim
Published: June 2023

Objective:

The purpose of this research was a pilot examination to identify and assess relationships among social vulnerability, personal resilience, and preparedness for a sample of US residents living in the Gulf South, who had experienced climate-related disaster (e.g., hurricanes) and the COVID-19 pandemic.

Methods:

Binary logistic regression was conducted using primary survey data collected in 2020 (n = 744) to identify statistically significant explanatory variables of sociodemographic characteristics and resilience, measured by the CD-RISC 10, of climate-related disaster, and pandemic preparedness.

Results:

Results indicate that respondents who identified as white, had more education, were in a relationship, and spoke English as a first language, as well as respondents who had exhibited greater resilience, were more likely to prepare for a climate-related disaster. Respondents who spoke English as a first language, had more education, and greater resilience were found to be statistically significant explanatory variables of pandemic preparedness. Respondents who prepared for disaster were also more likely to prepare for the pandemic.

Conclusions:

These findings provide insights into protective factors related to preparedness, including linkages between resilience and preparedness that can aid public health professionals in supporting resilience and preparedness efforts for impacted communities.
The intestinal microbiota as an ally in the treatment of Alzheimer’s disease
Authors: Sehn Hilgert Sabrina , Dias Daniel Penteado Martins
Published: June 2023

The evolution of the understanding of the intestinal microbiota and its influence on our organism leverages it as a potential protagonist in therapies aimed at diseases that affect not only the intestine but also neural pathways and the central nervous system itself. This study, developed from a thorough systematic review, sought to demonstrate the influence of the intervention on the intestinal microbiota in subjects with Alzheimer’s disease. Clinical trials using different classes of probiotics have depicted noteworthy remission of symptoms, whose measurement was performed based on screenings and scores applied before, during, and after the period of probiotics use, allowing the observation of changes in functionality and symptomatology of patients. On the other hand, faecal microbiota transplantation requires further validation through clinical trials, even though it has already been reported in case studies as promising from the symptomatology point of view. The current compilation of studies made it possible to demonstrate the potential influence of the intestinal microbiota on Alzheimer’s pathology. However, new clinical studies with a larger number of participants are needed to obtain further clarification on pathophysiological correlations.
COMPOSITIONAL MODELS FOR THE INTERNET OF THINGS
Authors: Briener Spencer , Jung Jooik , Subrahmanian Eswaran , Sriram Ram
Published: June 2023

The modularity of components has enhanced the ability to create IoT systems by composing them from off the shelf. However, the breadth of technological choices and capabilities of component devices has made designing these systems harder to select, compose, implement and test, especially for dynamic systems. In this paper, we adopt formal tools from category theory (CT), a branch of mathematics whose central tenet is compositionality, to generate models for IoT systems. More specifically, we introduce a port-graph operad to represent the architectural designs of IoT systems. We use presheaf categories to construct generic IoT schemas to support modularity. Given this information, we briefly describe its relationship to control strategies of dynamical systems that model the interaction of components. Our approach balances genericity and specificity, providing interlinked schematic representations of system architecture and component representation.
CONNECTING DESIGN ITERATIONS TO PERFORMANCE IN ENGINEERING DESIGN
Authors: Vrolijk Ademir-Paolo , Deng Yuanzhe , Olechowski Alison
Published: June 2023

No matter a system's size, complexity, or domain, iterations are fundamental to its design process. However, there is a duality: iterations are both signs of usefully exploring the system's design space and failure to find an appropriate solution. This ambiguity means that we have not been able to connect teams’ iterating behavior to their design's performance, potentially obscuring a way to influence the design process.

As such, our exploratory study unpacks the relationship between design iterations and performance. We observed 88 teams in the 2020 Robots to the Rescue Competition in rich detail. Using logs of 7,956 iterations on a Computer-Aided Design platform, we analyzed how high- and low-performing teams revised their submissions, searching for consistent differences in their behavior. We found significant differences in the iterations’ number, scale, and cadence between these groups of teams. These findings emphasized the correlation between certain iteration patterns and the success of a design: the best teams will likely revise differently than the worst ones. It also showed the importance of a fine-grained, time- dependent view of the design process to resolve open questions in the literature.
A DESIGNER'S UNDERSTANDING OF THE MAKER MOVEMENT
Authors: von Platen Vilhelm , Kitani Yoji
Published: June 2023

The maker movement has garnered interest from many disparate fields, from engineering to business management, to behavioural science, to city planning. The reason for this interest no doubt stems from the promised potential of the maker movement to revolutionize not only product creation and manufacturing, but in extension the economy around it. This paper examines existing literature across disciplines for evidence of what the maker movement has achieved so far, with a focus on implications for the field of Industrial Design.
CREATING AN OPEN-SOURCE, LOW-COST COMPOSITE FEEDER DESIGN TO IMPROVE FILAMENT QUALITY OF HIGH-PERFORMANCE MATERIALS TO BE USED IN FUSED FILAMENT FABRICATION (FFF)
Authors: Øvrebø Henrik H. , Koldre Svein-Andre , Nesheim Ole S. , Eikevåg Sindre Wold , Steinert Martin , Elverum Christer W.
Published: June 2023

Composite filaments are getting increased attention in additive manufacturing (AM). More and better solutions for filament production are needed to assist researchers in discovering new materials capable of producing AM-made high-performance parts. This article presents a method for producing composite filament, including an open-source, low-cost automatic composite feeder designed to increase the accuracy and quality of the filament. The feeder includes a fibre screw designed through an iterative prototyping process to accurately control the filament's fibre percentage while reducing lumps' occurrence in a single step. An experiment evaluating the quality of filament made of Polylactic Acid (PLA) and carbon fibre (CF) tested the use of the feeder compared to manual mixing. Filament with a nominal diameter of 2.85mm with 4.5%, 7.9%, 11.2% and 14.5% CF was made. The results suggest that the composite feeder improved the filament quality. The filament diameter RMSE value was reduced from 0.08 to 0.06 and 0.15 to 0.13 for both 4.5% and 11.2%, respectively. The article concludes that the feeder design may help researchers develop and discover new materials while improving the quality of the filament.
CROWDSOURCING ENGINEERING DESIGN PROBLEMS: LEARNING FROM EXPERIENCES
Authors: Obieke Chijioke C. , Milisavljevic-Syed Jelena , Han Ji
Published: June 2023

The availability of digital data in the fourth industrial revolution brings different trends with new opportunities and challenges for the engineering design community. As an opportunity, these trends would impact engineering design. However, the challenge is finding applications for these trends in engineering design. Crowdsourcing is one of the trends inspired by digital data. It is outsourcing an individually performed task to be mass-performed. This paper explores the application of crowdsourcing in identifying engineering design problems. Identifying an engineering design problem is an aspect of engineering design considered challenging but necessary for inventions. Secondary data from 63 invention-related cases and an interview with a renowned UK inventor are presented. The data contains scenarios on how the engineering design problems solved to qualify for a UK patent grant or application are identified. Lessons from the case studies are presented and discussed, especially regarding crowdsourcing engineering design problems. These seem to be promising ways of supporting the identification of new engineering design problems with inventive benefits once solved.
DATA-DRIVEN SMART MANUFACTURING: CASE STUDY OF WORKFORCE MANAGEMENT PROCESS IN AN ITALIAN LEATHER GOODS COMPANY
Authors: Pietroni Giorgia , Marconi Marco
Published: June 2023

Digitalization is one of the fundamental pillars of Industry 4.0. Within smart factories, Big Data Analytics systems play a key role in supporting the decision-making process of various stages of business processes. In this context, this research aims to identify solutions able to process large volumes of data from digital business processes with the final goal of adding value to the organisation. More specifically, the research deals with the implementation of a digital manufacturing tool able to digitize the workforce management process. The research has been applied in the case study of an Italian manufacturing company operating in the leather goods sector through the digitalization of the workforce management by a cloud-based platform. The implementation of the tool increases the efficiency of the production process, provides efficient management and integrates workforce data into one system. The implemented tool generates a large volume of data, the final goal is to make data user-friendly to support business decisions. Digitisation provides an exchange of information to support managers to make confident decisions.
DEALING WITH EXTREME REQUIREMENT VALUES: WHAT METHODS TO DESIGN SCHOOL CHAIRS AND OFFSHORE WIND TURBINES HAVE IN COMMON
Authors: Haselsteiner Andreas Florian , Thoben Klaus-Dieter , Blessing Lucienne
Published: June 2023

Many designs are “driven” by requirements that describe maximum or minimum values of high- variability variables that must be considered. In ergonomics, minima and maxima of anthropometric variables like body height shape the design of a product. Similarly, in structural design, the highest environmental loads that can be expected during the lifetime of a product drive the design. Consequently, a wide range of methods that help designers deal with extreme requirement values has been developed. In this paper, we review these methods and propose a model for the process of dealing with extreme requirement values. The model comprises two broad stages. In the first stage, requirement values are statistically defined and in the second stage, a design is synthesized and evaluated against the requirement values. Throughout the paper, we use two examples: the design of an ergonomic chair and of an offshore wind turbine. We focus on how requirement values are defined for these two products and how they are used throughout the design process. Although these products are vastly different, both are designed by statistically deriving requirement values and then systematically designing against these values.
DECISION SUPPORT FRAMEWORK USING KNOWLEDGE BASED DIGITAL TWIN FOR SUSTAINABLE PRODUCT DEVELOPMENT AND END OF LIFE
Authors: Mouflih Chorouk , Gaha Raoudha , Durupt Alexandre , Bosch-Mauchand Magali , Martinsen Kristian , Eynard Benoit
Published: June 2023

In order to have a sustainable disassembly process, a successful decision-making based on reliable and up-to-date information should be made while taking into consideration sustainability indicators. In this context, The aim of this paper is to introduce a decision support system based on knowledge based and digital twin in order to help stakeholders to choose the most sustainable disassembly scenario .In this research, firstly, we presented the state of art of disassembly process, digital twin, knowledge based system and the merging of knowledge based system and digital twin for disassembly. Secondly, we presented the knowledge based digital twin (KBDTw) system framework for a sustainable disassembly process. Thirdly, a case study is presented about the use of KBDTw in the end-of-life of internet boxes. Finally, a conclusion and future work are conducted.
DESIGN AND DEVELOPMENT OF A LOW-COST PEDIATRIC VIDEOLARYNGOSCOPE
Authors: Londoño Maria José , Arango Jose Fernando , Isaza Juan Felipe
Published: June 2023

Endotracheal intubation is performed to provide ventilatory support to a patient of any age. Every medical procedure that requires general anesthesia requires intubation, and for this reason, it is a life-saving procedure. This maneuver is a challenge in pediatric patients between 0 months and 12 years of age, since their anatomy and oxygen consumption differ compared to an adult.

In patients with difficult airways, where there is no good visibility of the structures, a videolaryngoscope is used. It has higher success rates compared to a conventional laryngoscope. Its use has become widespread since the COVID-19 pandemic, as it reduces exposure to respiratory secretions.

This article presents the design, manufacture and testing of a low-cost pediatric videolaryngoscope, for patients between 6 and 12 months, and which are intended to respond to the low availability of this type of equipment in Colombian health care centers. The BioDesign Innovation Process methodology was adapted for its creation. The prototypes were manufactured using 3D printing. Validation was performed by 28 experts using simulators and the results were promising, obtaining a success rate of 98.8% for the designed device.
DESIGN METHODS FOR DIAGNOSING AND LOCATING ENTANGLED TECHNICAL DEBT IN DEVOPS FRAMEWORKS
Authors: Bonet Faus Jose , Le Masson Pascal , Pelissier Ugo , Jibet Nafissa , Bordas Antoine , Pajot Sebastien
Published: June 2023

In the IT landscape, DevOps is the preferred approach for developing and maintaining rapidly evolving systems that require continuous improvements. Yet, DevOps frameworks do not entirely prevent the accumulation of Technical Debt (TD), and under certain circumstances DevOps can even contribute to generating TD. This paper focuses on a specific type of TD, Entangled Technical Debt (ETD), that corresponds to the implicit complexification of a system's design and the appearance of unintentional couplings in its architecture over time. Our work seeks to inform methods for Diagnosing and Locating ETD in DevOps frameworks. Through a research partnership with Ubisoft's IT branch, an experimental case-study was conducted. It takes the form of an assessment of 6 innovative IT projects and a subsequent in-depth architecture analysis of an individual IT system, which enabled the characterization of the mechanisms linking DevOps to ETD. This allowed us to develop and test practical methods for diagnosing and locating ETD in IT systems.
DESIGN OF WEARABLE TENSEGRITY STRUCTURES FOCUSING ON THE TENSION PROPAGATION FUNCTION THROUGHOUT THE BODY
Authors: Wakashima Hiroki , Kishino Kodai , Iizuka Shinpei , Tamachi Masahiro , Wesugi Shigeru
Published: June 2023

Humans are able to perform skilful movements by coordinating muscles throughout the body. It has been revealed that not only neural mechanisms but also direct and dynamic interactions between body parts contribute to muscular coordination. Tensegrity, accurately biotensegrity, can be considered to the basic mechanism for the interactions. Tensegrity structures are composed of tensile and compressive components, and are lighter and more flexible than existing rigid structures. The authors investigated designing wearable tensegrity structures for extending human motor ability, especially assisting in carrying heavy objects. Based on Flemons' spine model, we devised a columnar tensegrity structure that can be expanded to the size of the whole body, and connected each of four columns to the front and back of the body on right and left side. The wearable tensegrity structures can deform flexibly due to tension distribution when external force is applied, and follow the human motions in twisting trunk and walking. Experimental results in carrying heavy objects showed that some muscle activities around hip and knee tended to decrease by using the structures when those joints extended.
A DIGITAL TWIN BUSINESS MODELLING APPROACH
Authors: Trauer Jakob , Mac Duc Phat , Mörtl Markus , Zimmermann Markus
Published: June 2023

Digital Twins are one of the most trending topics. However, there are still open issues in the development of Digital Twins. One of these impediments is formulating a clear and valid value proposition of a Digital Twin. Therefore, this paper presents a novel business modelling approach for Digital Twins. Based on a literature review and an academic case study, different business modelling approaches and techniques were systematically compared, selected and adjusted in order to develop a new framework suitable for describing the value of Digital Twins. It consists of 10 steps – (1) describe a basic development concept of the DT, (2) identify the customer segments, needs and pain points, (3) derive a value proposition (4) identify revenue streams and values created, (5) identify key activities, (6) resources needed, and (7) necessary partners. (8) Adapt the organization to fit the business model and (9) evaluate the cost structure of the project. In the end, document and communicate the new business model (10). Each step is supported by auxiliary methods, tools and procedures. The approach was applied to a scientific case study. In an initial evaluation the overall applicability and usefulness of the approach were confirmed.
DESIGN OPTIMIZATION FOR ENVIRONMENTAL SUSTAINABILITY: A FRAMEWORK TO SELECT THE BEST ECO-DESIGN STRATEGY
Authors: Cappelletti Federica , Manuguerra Luca , Rossi Marta , Germani Michele , Sartini Mikhailo
Published: June 2023

Environmental sustainability represents an unavoidable design driver. The consciousness of the importance of tackle the topic of environmental sustainability since the first stages of the product lifecycle is slowly spreading through enterprises. However, although they reach this grade of awareness, it is hard to introduce additional considerations to the traditional drivers of functionality, manufacturability, assembly, cost, etc. Therefore, it is crucial to identify methods and tools to support companies in efficiently integrating environmental sustainability issues in their design process. This paper proposes an approach to identify the inputs, functionality and outputs suitable to each industrial reality. Its core is the eco-design tool matrix, that estimates the tool implementation time and suggests proper outputs; from this the necessary inputs and functional blocks are derived. The approach is applied to the cases of two Italian industries, very different one another. This proves the wide applicability of the approach. The definition of a validation procedure represents the next steps to identify the benefits of the approach.
DESIGN SPRINT: USE OF DESIGN METHODS AND TECHNOLOGIES
Authors: Huić Iris , Horvat Nikola , Škec Stanko
Published: June 2023

This paper analyses the use of design methods and information and communication technology (ICTs) tools in design sprint (DS) activities. Team members, team leaders, and coaches of five international student teams were interviewed (40 interviews in total) regarding their use of design methods and ICT tools during three DS activities: problem definition, conceptual design, and embodiment design. The results show that teams utilise various methods through three approaches: one method for the task, several methods for the task, or adjusting methods. Teams considered several aspects when deciding which method to utilise: the possibility of work distribution, the time needed to execute the method and their prior experience in using the method. The results on using ICT tools suggest that teams mainly use the collaborative whiteboard and Computer-aided design (CAD). In this context, tools that enable continuous sharing of the work in progress (e.g., cloud-based tools) show great potential for DS activities. Finally, the results show a potential to integrate various tools in order to enable easy transition between tasks (e.g., a transition from collaborative whiteboard to CAD modelling).
DESIGNING FOR HUMAN FACTORS: DEVELOPMENT AND EVALUATION OF A HARMONISTIC KNOWLEDGE-BASED DESIGN DECISION SUPPORT TOOL
Authors: Agius Sean , Farrugia Philip , Francalanza Emmanuel
Published: June 2023

Dual ontological products are a physical construction and an emotional construction. Multitude of human factors must be considering when designing dual ontological products. To increase the product's impact and reach, designers should also understand the requirements of potential users. A design stage conflict exists between the emotional construction and the physical construction of a product when considering human factors. Designers find it difficult to achieve the right compromise between these constructions and hence, the balancing of the two is crucial. This research therefore contributes a novel harmonistic knowledge-based framework which makes designers aware of design stage conflicts and consequences of commitments made on human factors in the use-phase of the artefact. This approach was implemented in a machine learning based computational tool which exploits harmonistic knowledge and information collected from potential users to proactively assist, guide, and motivate product designers. This paper also presents a descriptive study for the evaluation of the framework and its implementation as a computer-based prototype tool. Results show the necessity and beneficial use of the tool for design engineering practice.
DESIGNING SERIOUS GAMES TO UNDERSTAND THE CHALLENGES OF THE ANTHROPOCENE
Authors: Boissier Mathilde , Jost Vincent , Mangeot Mathieu , Viénot Léa
Published: June 2023

The challenges of the Anthropocene require a deep transformation of the world's economic organization. In order to manage such a change, it is necessary to have a systemic vision of the resources, processes at stake and their interdependencies. One possible approach to modeling part of this complexity is biophysical flow accounting. One of the challenges is to involve populations in participatory processes. It is therefore important to understand the systemic effects. However, biophysical accounting tools remain too complicated.

This is why we have designed serious games to present the issues in a simple way, to articulate them with concrete experiences already lived by citizens and to take a step back, by mobilizing their participation, their emotions and the discussions.

The first game was designed to show the geographical transfer of pressure through the description of the steps leading to the purchase of a chicken, starting with the vegetable culture allowing to feed it.

The second game was designed to show the competition of use between resources. Designed as a board game, it also involves reflection on the cooperative and competitive aspects of many societal situations.
DEVELOPMENT OF A 2D BIOMECHANICAL MODEL TO SIMULATE SEATED MULTIDIRECTIONAL ARM STRENGTH OF PEOPLE WITH C5-C7 TETRAPLEGIA
Authors: Stilwell George , Symons Digby , Gooch Shayne
Published: June 2023

People living with tetraplegia experience a significant loss of sensory and motor function; with the severity depending on their injury level and completeness. To complete tasks independently, people with tetraplegia often rely on assistive devices. To avoid upper extremity pain, designs should not require applications of force near the limits of the user's physical strength. This paper establishes a 2D biomechanical model using static equilibrium and joint torque limits to predict multidirectional strength patterns in the sagittal plane for people with C5 to C7 tetraplegia in a seated position. The results from the biomechanical model highlight the areas and directions of high strength. The strength patterns observed in this paper provide an opportunity for designers to evaluate strength requirements and take advantage of areas and directions of high strength and ensure that users are not required to apply force near their physical limit. In doing this, designs such as assistive devices can be developed that enable users with a reduction in strength to operate them independently.
DEVELOPMENT OF A NOVEL DIABETIC FOOT RISK ASSESSMENT FOR LOW-RESOURCE HEALTHCARE SETTINGS: A CASE STUDY OF LEAN DESIGN
Authors: Reddie Madison , Frey Daniel
Published: June 2023

Interest in applying a “lean” philosophy to design has been slowly growing in recent years, but there are still few broadly applicable methodologies and illustrative cases published in the literature to guide lean design processes. Lean approaches promise cost reduction and increased product value, which could be particularly beneficial in product development for low- and middle-income country markets, where value demands are high. We use the clinical need of efficient diabetic foot risk assessment in lowresource healthcare settings to present an example of lean early-stage design of a medical device. The background of existing medical literature and commercial products is intentionally leveraged throughout the design process to streamline development and minimize the need for independent validation of product strategies and design features. Our approach resulted in an efficient design process that generated a novel, purely mechanical plantar pressure evaluation device that can indicate high risk of diabetic foot ulcer in resource-constrained settings. This case provides a practical example of how design processes can be adapted to be leaner where there are large gains from minimizing design cycle time and cost.