bluuebunny/crossref_metadata_2025 huggingface dataset:
Analysis of Primary Safety Barrier on Workover Operations Using MCD on Deepwater Scenarios – Design and Execution
Authors: Roman R. S. , Fernandes A. A. , Cisneiros C. N. , Schnitzler E. , Sales I. M. , Ascaneo W. M. , Pereira R. H. , Tinoco D. M. , Bezerra E. M.
Published: September 2024

Intelligent completion installed in Brazilian pre-salt wells presents some challenges for workover. Pre salt ultra-deep-water wells are commonly equipped with two or three zones of integral intelligent completion, where severe fluid losses after acid stimulation, in depths is present on all wells.

The usual methods to remove the intelligent completion string requires controlling fluid losses to the reservoir or installing a mechanical barrier to isolate the reservoir. Both options have a high risk of non-productive time and safety risks.

A new approach is to remove the completion string in a single trip while dealing with losses. The reservoir would be communicated with the drilling riser while pulling the completion string. Clamps and flatpacks will be in front of the BOP during this trip. To control the risks, the project team developed tools and procedures to use MPD equipment and Mud Cap techniques during the critical parts of the operation.

One of the challenges faced was to prove that ALARP (As Low as Reasonably Practicable) was achieved in non-normative operations. This article will describe the concept and equipment used on the successful intervention. The objective is to present a new use of current MPD techniques for well maintenance operations. There will be special focus on the primary safety barrier during the operations and contingencies since there is no similar operation reported in the industry.
Rig Contractor's Best Practices and Lessons Learned for Contractor Owned MPD Deepwater Systems
Authors: Thain Jon , Brinkley Ryan , Palm Curtis , Duong Linden , Barker Ian , Hal Ebrahim , Arnone Maurizio , Shah Prashant , Sammat Essam
Published: September 2024

For many years, the MPD industry was expecting the definitive adoption of the technology by the offshore rig contractor. During that period, rental models were the norm, but the trend is showing definitive signs of rig companies investing in MPD capital as well as preparing their own personnel to run MPD directly.

With equipment that will be permanently installed on the rig, the rig contractors demand the level of technology that will better fit their business model for many years from MPD suppliers. Including capabilities to handle different MPD techniques with the same equipment in an efficient way in the event the project requires quick switches between MPD techniques such as, Constant Bottom Hole Pressure, Pressurized Mud Cap Drilling, and Riser Gas Handling.

The rig contractor is now the owner of the MPD equipment and can offer it directly to the operator company instead of using a third-party service provider as an intermediary. With that said to have an entire MPD independence, the rig crew must be trained properly and comply with the competency system that third parties have demonstrated to be successful in using it during the developing years.

This paper summarizes the practices, lessons learned, and knowledge transfer process that made the rig contractor successful in installing and using the acquired MPD equipment in different areas of the world while at the same time preparing their rig crew to operate the MPD software provided by the third-party MPD service provider.
Productivity Comparison of Different Completion & Stimulation Strategies with Underbalanced Coiled Tubing Drilling in Gas Carbonate Reservoirs
Authors: AlSaad Mohammed , Brohi Imad
Published: September 2024

Gas condensate reservoirs often require special completion and stimulation techniques to maximize productivity. Workovers performed due to well integrity issues often lead to formation damage which can severely impact the production potential from these wells. Some of the most commonly used well completion techniques are conventionally stimulated vertical wells, Multi-Stage Fracturing (MSF) with ball drop systems or plug and perf systems. More recently, these completion systems have been challenged by Underbalanced Coiled Tubing Drilling (UBCTD), which has proven to yield high. This paper aims to compare the post-completion production performance achieved with these completion techniques with special emphasis on UBCTD while factoring in reservoir characteristics that contribute to such results.

Furthermore, to thoroughly assess the productivity index associated with each well type, an extensive review was conducted on the advantages and limitations of UBCTD, MSF wells, and conventionally stimulated vertical wells. The review focused on the various factors that influence productivity, such as relative comparison of reservoir properties, wellbore stability, drilling fluid selection, and completion techniques.

This paper introduces a novel integrated approach to evaluate the PI of gas wells drilled using UBCTD technology, MSF wells, and conventionally stimulated vertical wells. Specialized plots were developed which helped in comparative assessment of the different completion types and also understand the differences. The proposed method combines the analysis of normalized field data, numerical simulation and a comprehensive review, offering a more reliable and accurate assessment of well productivity and the reasoning behind exhibited results. Furthermore, the paper highlights the importance of considering various factors, such as drilling fluid selection, and completion techniques, in optimizing the PI of gas wells. This study provides valuable insights for reservoir engineers, drilling engineers, and decision-makers in selecting the optimal well configuration and drilling technology to maximize hydrocarbon production.
MPD Helped Successfully Drill a Central European Well to TD After Multiple Failures in a Formation Fraught with Wellbore Instability and Formation Pressure Uncertainties
Authors: Kaldirim O. , Nauduri S. , Guefack G. , Morris J. , Fisher D. , Spahn M. , Howell R. , Parker M. , French P. , Leggett C.
Published: September 2024

MPD successfully delivered the first well in a remote Balkan region of Central Europe after multiple failed conventional drilling attempts into a reservoir fraught with formation pressure uncertainties and significant wellbore breakout. This paper discusses the MPD planning and execution strategies for managing the formation pressure uncertainties and borehole breakout, as well as the performance of the MPD system in handling larger cuttings and cavings.

MPD offers many opportunities, such as using a reduced mud weight and tracking the lower pressure boundary, coupled with the ability to respond rapidly to changing formation pressures. Challenges arise when wellbore stability pressure is uncertain, leading to breakouts at the borehole wall. This results in larger cuttings and cavings that can potentially plug the choke, causing pressure fluctuations and potentially leading to charged fractures, thereby further exacerbating the situation. These scenarios require detailed analysis, extensive planning, and rapid response.

The engineering team's planned response to the formation and fracture pressure uncertainties, combined with field execution and MPD system performance, enabled Shell Upstream Albania B.V. to successfully drill the well to the planned TD and secure and isolate multiple fracture zones with liner and MPC for stimulation and testing for the first time in the region. The well was drilled and completed with minimal losses while encountering major borehole breakout and with "0″ NPT due to choke plugging. MPD also enabled the client to obtain the first set of logs for the reservoir in this region with LWD. The liner was successfully run to TD, and bottom hole pressures were managed while cementing with MPD.
Asphaltene-Silica Interactions in Salinity Water and Their Ion Dependence
Authors: Wu Yining , Luo Qi , Liu Changlong , Zhao Mingwei , Wu Wenting , Yang Yang , Sun Linghui , Ji Bingyu , Dai Caili
Published: September 2024

The adsorption of asphaltene on the pore surface not only forms a dense adsorption film but also induces a transition in sandstone wettability to more hydrophobic, which poses challenges to oil displacement, especially in unconventional reservoirs. The asphaltene adsorption exhibits a strong ion dependence, especially toward high ion concentration and high-valence cations, and the mechanism is not yet entirely understood. In this work, atomic force microscopy (AFM), coreflooding experiments, and the self-priming rate method were used to investigate the impacts of ion concentration and types in connate water on the adsorption of asphaltene. Enhanced asphaltene adsorption is observed in the presence of ions, leading to a more pronounced hydrophobic character in the cores saturated by high-salinity water. Then, we proceed with a consideration of the attraction force law between asphaltene and rock. The attraction showed an exponential decay with respect to distance and is in accordance with the hydrated ion bridge interaction. Furthermore, the attraction intensified notably in CaCl2 solution compared to that in NaCl solution and was enhanced progressively with increasing ionic concentration. Therefore, the adsorption amount of asphaltene and ultimately the wettability of the rock are affected by ion concentration and valence in formation water. Our findings hold significant implications for enhancing oil recovery in unconventional reservoirs under high-salinity conditions.
Permeable Cement Based on Foamed Cement and Permeable Skeleton Materials
Authors: Wang Q. , Bu Y. , Lu C. , Liu H. , Guo S. , Xu H.
Published: September 2024

Permeable cement has been widely used in the construction industry. In oil fields, the use of permeable cement to replace screens and reduce the cost of well construction has been attempted. However, the compressive strength of permeable cement is low. Herein, a new method for producing permeable cement using foamed cement and permeable microspheres (PMs) is proposed. A permeable cement slurry system is produced by selecting the foaming agent, foam stabilizer, length and dosage of basalt fibers, and permeable skeleton materials (PSMs). The system formula is Jiahua G-grade cement + 1.3% alpha-olefin sulfonate (AOS) + 0.5% xanthan gum (Xg) + 2% nano-SiO2 + 1% 6-mm basalt fiber + 30% PM. The compressive strength and permeability of the permeable cement were tested using compressive strength and hydraulic permeability tests, respectively. The compressive strength of this system could reach 6.6 MPa when it was cured for 2 days at 50°C. Its liquid permeability could reach 0.06×10−3 μm2 when it was cured for 14 days at 50°C.
From electrons to phase diagrams with machine learning potentials using pyiron based automated workflows
Authors: Menon Sarath , Lysogorskiy Yury , Knoll Alexander , Leimeroth Niklas , Poul Marvin , Qamar Minaam , Janssen Jan , Mrovec Matous , Rohrer Jochen , Albe Karsten , Behler Jörg , Drautz Ralf , Neugebauer Jörg
Published: September 2024

We present a comprehensive and user-friendly framework built upon the pyiron integrated development environment (IDE), enabling researchers to perform the entire Machine Learning Potential (MLP) development cycle consisting of (i) creating systematic DFT databases, (ii) fitting the Density Functional Theory (DFT) data to empirical potentials or MLPs, and (iii) validating the potentials in a largely automatic approach. The power and performance of this framework are demonstrated for three conceptually very different classes of interatomic potentials: an empirical potential (embedded atom method - EAM), neural networks (high-dimensional neural network potentials - HDNNP) and expansions in basis sets (atomic cluster expansion - ACE). As an advanced example for validation and application, we show the computation of a binary composition-temperature phase diagram for Al-Li, a technologically important lightweight alloy system with applications in the aerospace industry.
Physiological, transcriptomic, and metabolomic analyses of the chilling stress response in two melon (Cucumis melo L.) genotypes
Authors: Diao Qiannan , Tian Shoubo , Cao Yanyan , Yao Dongwei , Fan Hongwei , Jiang Xuejun , Zhang Wenxian , Zhang Yongping
Published: September 2024

Background
Chilling stress is a key abiotic stress that severely restricts the growth and quality of melon (Cucumis melo L.). Few studies have investigated the mechanism of response to chilling stress in melon.
Results
We characterized the physiological, transcriptomic, and metabolomic response of melon to chilling stress using two genotypes with different chilling sensitivity (“162” and “13-5A”). “162” showed higher osmotic regulation ability and antioxidant capacity to withstand chilling stress. Transcriptome analysis identified 4395 and 4957 differentially expressed genes (DEGs) in “162” and “13-5A” under chilling stress, respectively. Metabolome analysis identified 2347 differential enriched metabolites (DEMs), which were divided into 11 classes. Integrated transcriptomic and metabolomic analysis showed enrichment of glutathione metabolism, and arginine and proline metabolism, with differential expression patterns in the two genotypes. Under chilling stress, glutathione metabolism-related DEGs (6-phosphogluconate dehydrogenase, glutathione peroxidase, and glutathione s-transferase) were upregulated in “162,” and GSH conjugates (L-gamma-glutamyl-L-amino acid and L-glutamate) were accumulated. Additionally, “162” showed upregulation of DEGs encoding ornithine decarboxylase, proline dehydrogenase, aspartate aminotransferase, pyrroline-5-carboxylate reductase, and spermidine synthase and increased arginine, ornithine, and proline. Furthermore, the transcription factors MYB, ERF, MADS-box, and bZIP were significantly upregulated, suggesting their crucial role in chilling tolerance of melon.
Conclusions
These findings elucidate the molecular response mechanism to chilling stress in melon and provide insights for breeding chilling-tolerant melon.
CD39 activities in the treated acupoints contributed to the analgesic mechanism of acupuncture on arthritis rats
Authors: Li Yu-Jia , Lin Jie , Tang Si-Qi , Zuo Wei-Min , Ding Guang-Hong , Shen Xue Yong , Wang Li-Na
Published: September 2024

Background
Our previous work had identified that at the acupuncture point (acupoint), acupuncture-induced ATP release was a pivotal event in the initiation of analgesia. We aimed to further elucidate the degradation of ATP by CD39.
Methods
Acupuncture was administered at Zusanli acupoint on arthritis rats, and pain thresholds of the hindpaws were determined. Pharmacological tools or adeno-associated viruses were administered at the acupoints to interfere with targeting signals. Protein expression was determined with qRT-PCR, WB, or immunofluorescent labeling. Cultured keratinocytes, HaCaT line, were subjected to hypotonic shock to simulate needling stimulation. Extracellular ATP and adenosine levels were quantified using luciferase-luciferin assay and ELISA, respectively.
Results
Acupuncture-induced prompt analgesia was impaired by inhibiting CD39 activities to prevent the degradation of ATP to AMP, but was mimicked by administering CD39. Acupuncture-induced ATP accumulation exhibited synchronous changes. Similarly, acupuncture analgesia was hindered by suppressing CD73 to prevent the conversion of AMP to adenosine. Furthermore, the acupuncture effect was replicated by agonism at P2Y2Rs, but inhibited by antagonism at them. Acupuncture upregulated CD73 and P2Y2Rs, but not CD39. Immunofluorescent labeling demonstrated that keratinocytes were a primary site for these proteins. Shallow acupuncture also demonstrated antinociception. In vitro tests showed that hypotonic shock induced HaCaT cells to release ATP and adenosine, which was impaired by suppressing CD39 and CD73, respectively. Finally, agonism at P2Y2Rs promoted ATP release and [Ca2+]i rise.
Conclusion
CD39 at the acupoints contributes to the analgesic mechanism of acupuncture. It may facilitate adenosine signaling in conjunction with CD73, or provide an appropriate ATP milieu for P2Y2Rs. Skin tissue may be one of the scenes for these signalings.
Research and Application of TLC Identification Method for Homoisoflavanones in Polygonatum odoratum (Mill.) Druce
Authors: Zang Jialin , Li Gang , Zhao Chaoyang , Lv Zhen
Published: September 2024

We created a fast and effective thin-layer chromatography method to detect homoisoflavones in Polygonatum odoratum (Mill.) Druce (POD), demonstrating high sensitivity, specificity, and stability. Utilizing this method, we assessed the quality of 20 commercial batches of POD. Our results indicated that homoisoflavones (III, IV, and V) were present in 8 samples, absent in 7, and detected in 5. This method facilitates the effective evaluation of POD germplasm resources, laying a strong foundation for enhancing quality standards. This advancement aids in the standardization and quality control of POD, ensuring the consistency of its active ingredients and thereby supporting its therapeutic applications.
ИСТОРИЈСКИ КОНТЕКСТ И ЈЕЗИЧКЕ СПЕЦИФИЧНОСТИ XXIV ЧЛАНА САЛИЈСКОГ ЗАКОНА
Authors: М. Љубишић Сања , Ђ. Костадиновић Рачић Александра
Published: September 2024

У раду ће бити ријечи о историјском контексту и језичким специфичностима XXIV члана Салијског закона, који нам, између осталог, говори о убиствима нејаких особа, првенствено, дјеце и жена, као и о врстама казни које су биле предвиђене за то кривично дјело. Салијски закон, по многима један од „најгерманскијих” закона, настао је почетком VI вијека и представља збирку закона обичајног права Салијских Франака, у различитим временским периодима. Прве двије редакције Закона, уједно и најстарије, датирају из времена владавине династије Меровинг, док остале редакције Закона потичу из VIII и IX вијека. Осим што је непроцјењив извор историчарима и правницима, Салијски закон веома је занимљив и филолозима. Језичка вриједност овога Закона огледа се у раним обиљежјима средњовјековног латинског језика и у нелатинским глосама, смјештеним унутар латинског текста. Овај Закон указује нам и на лингвистичке специфичности тога времена, које се огледају у одређеним фонетским промјенама, специфичним лексичким обиљежјима и употреби архаизама. Све то пружа вриједан увид у еволуцију латинског језика и његов утицај на развој романских језика.
EXISTENTIALS, LOCATIVES AND INVERSE LOCATIVES IN ŠTIVORIAN
Authors: Frasson Alberto
Published: September 2024

The present study investigates syntactic and interpretive properties of existential, locative and inverse locative constructions in Štivorian, a northern ItaloRomance variety spoken in north-eastern Bosnia and Herzegovina. I discuss the definiteness effect (Milsark, 1974), focusing on cross-linguistic properties of locative and existential constructions, both at the structural and interpretive level. On the one hand, existentials show default agreement with a post-copular indefinite pivot in existentials; on the other hand, locatives show full agreement with a pre-copular definite pivot. In addition to this opposition, Štivorian displays inverse locatives, exhibiting mixed properties of existential and locative constructions. The goal of the present study is to show that existential and locative constructions have distinct underlying structures; inverse locatives allow for a structural analysis that parallels that of existentials, with additional interpretive properties that make them akin to regular locative constructions.
ИЗНЕВЕРЕНА ПАРАБОЛА КАО КОНСТИТУТИВНА ФИГУРА У КАФКИНОМ РОМАНУ ПРОЦЕС
Authors: Миловић Никола
Published: September 2024

Овај рад бави се анализом Процесa користећи се старозаветном фигуром параболе као кључном у тумачењу Кафкиног романа. Претпоставка текста јесте да се Кафкин роман образује налик параболичким религиозно-сакралним текстовима, али уз изневеравање коначног параболичког смисла. Фундаментални елементи параболе ‒ метафизички смисао и људска слобода бивају померени из свог лежишта. Кроз даљи текст показаћемо како се промена параболе догађа због новог доживљаја религиозног, пре свега кроз капиталистичко присвајање сакралних прерогатива. Служећи се цртицама Валтера Бењамина из текста Капитализам као религија указаћемо на капиталистички извор кривице Јозефа К. Свет Процеса одликује се, пре свега, свеприсутношћу суда, што има за циљ опонашање свеприсутности Бога, па самим тим и опонашање његове сакралне утемељености. Такође, основна особина ликова јесте десупстанцијализација, односно испражњеност од духовног садржаја. Такви појединци нису у стању да у себе похране параболички смисао, а истовремено нису у стању ни да успоставе стварне међуљудске односе. У свету конституисаном изневереном параболом не постоји могућност за срећно разрешење: нити таква парабола може зајамчити  смисао, нити се десупстанцијализовани појединац може побунити. Једини начинкоји је преостао јесте равнодушни одлазак у смрт.
CONVERSATIONAL STRUCTURE AND TURN-TAKING MANAGEMENT IN INTERACTIONS BETWEEN CLIENTS AND OFFICERS AT A DRIVERS LICENSING OFFICE IN NIGERIA
Authors: Moses Melefa Omotosho , Ogban Uwen God’sgift , Victoria Ozor Amuchechukwu
Published: September 2024

This study examines conversational structure and turn management in interactions between clients and officers of the Federal Road Safety Commission (FRSC) at a Nigerian drivers licensing office in order to unveil how sociocultural nuances shape the structure of conversations in this context. The data comprised 21 samples of interaction sequences which were purposively selected from over 13 hours of tape-recordings and analysed using Conversation Analysis. The findings reveal that the interactions are organised in adjacency pairs and expanded most of the time with insertion sequences. Also, turns are shared between the officers and clients through self-selection, current-speaker-selects-next and sustained-turns procedures, which are largely within the control of the officers. There are various cues of silence and pauses, socio-centric sequences, adjacency pairs, drawls, pitch, overlap and interruptions, which are turn-taking and turn-giving cues in the interactions. These features reveal the interactions as institutional talk, which is peculiar to this social environment.
Using Hough transform to define track boundaries as part of machine vision by train traffic-tracking hardware and software systems
Authors: Polevskiy I. S.
Published: September 2024

Aim. In the context of machine vision, the problem of detected object boundary definition is usually solved using semantic segmentation that requires a high computational resource. Its application increases the complexity and the cost of the implemented hardware and software systems. This paper proposes an alternative method for defining the boundary of a segmented object, i.e., a railway track, for a train traffic tracking system. Methods. Since a railway track in an image can be represented by an n-th order polynomial, it is suggested to solve the problem of track boundary detection by using approximations in the form of straight lines. It is suggested using the Hough transform to detect straight lines. The former’s parametric space will be arranged in accordance with the problem to be solved. Conclusions. The proposed approximation will allow abandoning semantic segmentation and reduce the computational complexity and load.
On the dependability function of a system. Part I. Analytical results
Authors: Rykov V. V. , Ivanova N. M.
Published: September 2024

The paper aims to study the primary dependability characteristics of restorable k-out-of-n systems with arbitrary distributions of failure-free time and time to component repair, as well as the total number of repair units. A k-out-of-n system is a system consisting of n components that fails when k out of its (k≤n) components fail. l repair devices are available for restoring failed components. Such a system is denoted as . The research employed marked Markov processes and the theory of order statistics. Using the proposed approach, a mathematical system model was constructed, marks transformations were mapped and analytic expressions for calculating their distributions were given. In the following part of the paper, using the proposed method, a simulation algorithm will be defined for the purpose of assessing the key dependability characteristics. It will not only enable a numerical study of such systems, but will also help analyse the sensitivity of the dependability characteristics to the initial system parameters.
The effect of low-intensity radiation on the speed of CMOS microcircuits
Authors: Kuzminova A. V. , Popov V. D.
Published: September 2024

Aim. The degradation of CMOS microcircuits exposed to ionizing radiation was analysed. Three MOS defect formation processes at the Si-SiO2 boundary were examined. Methods. Using the example of test logic elements, the dependence of the time of conditional speed failure on the gamma dose rate was analysed. Findings. A critical defect at the Si-SiO2 boundary was identified. Conclusions. The approach proposed in the paper allows identifying the causes of CMOS microcircuit failures. Calculated failure times for three dose rates are presented.
Requirement Analysis of Different Variants of a Measurement and Training Station for Older Adults at Risk of Malnutrition and Reduced Mobility: Focus Group Study
Authors: Happe Lisa , Sgraja Marie , Quinten Vincent , Förster Mareike , Diekmann Rebecca
Published: September 2024

Background

Demographic change is leading to an increasing proportion of older people in the German population and requires new approaches for prevention and rehabilitation to promote the independence and health of older people. Technical assistance systems can offer a promising solution for the early detection of nutritional and physical deficits and the initiation of appropriate interventions. Such a system should combine different components, such as devices for assessing physical and nutritional status, educational elements on these topics, and training and feedback options. The concept is that the whole system can be used independently by older adults (aged ≥70 years) for monitoring and early detection of problems in nutrition or physical function, as well as providing opportunities for intervention.

Objective

This study aims to develop technical and digital elements for a measurement and training station (MuTs) with an associated app. Through focus group discussions, target group requirements, barriers, and favorable components for such a system were identified.

Methods

Older adults (aged ≥70 years) were recruited from a community-based setting as well as from a geriatric rehabilitation center. Focus group interviews were conducted between August and November 2022. Following a semistructured interview guideline, attitudes, requirements, preferences, and barriers for the MuTs were discussed. Discussions were stimulated by videos, demonstrations of measuring devices, and participants’ ratings of the content presented using rankings. After conducting 1 focus group in the rehabilitation center and 2 in the community, the interview guide was refined, making a more detailed discussion of identified elements and aspects possible. The interviews were recorded, transcribed verbatim, and analyzed using content analysis.

Results

A total of 21 older adults (female participants: n=11, 52%; mean age 78.5, SD 4.6 years) participated in 5 focus group discussions. There was a strong interest in the independent measurement of health parameters, such as pulse and hand grip strength, especially among people with health problems who would welcome feedback on their health development. Participants emphasized the importance of personal guidance and interaction before using the device, as well as the need for feedback mechanisms and personalized training for everyday use. Balance and coordination were mentioned as preferred training areas in a MuTs. New training options that motivate and invite people to participate could increase willingness to use the MuTs.

Conclusions

The target group is generally open and interested in tracking and optimizing diet and physical activity. A general willingness to use a MuTs independently was identified, as well as a compelling need for guidance and feedback on measurement and training to be part of the station.
Interaction Effects Between Low Self-Control and Meaning in Life on Internet Gaming Disorder Symptoms and Functioning in Chinese Adolescents: Cross-Sectional Latent Moderated Structural Equation Modeling Study
Authors: Fong Ted CT , Cui Kunjie , Yip Paul SF
Published: September 2024

Background

Internet gaming disorder (IGD) is an emerging behavioral addiction with mental health implications among adolescents. Low self-control is an established risk factor of IGD. Few studies have, however, examined the moderating role of meaning in life (MIL) on the relationships between low self-control and IGD symptoms and functioning.

Objective

This study aimed to examine the effects of low self-control and MIL and their interaction effects on IGD symptoms and family and school functioning in a structural equation model.

Methods

A sample of 2064 adolescents (967, 46.9% male; mean age 14.6 years) was recruited by multistage cluster random sampling from 5 middle schools in Sichuan, China, in 2022. The participants completed a self-report questionnaire with validated measures on low self-control, presence of MIL, search for MIL, IGD symptoms, school commitment, and family functioning. Construct validity, measurement invariance, and structural invariance of the measures were evaluated by confirmatory factor analysis across sex. Structural equation modeling was conducted to examine the indirect effects of low self-control and MIL on family and school functioning through IGD symptoms. Latent moderated structural equation modeling was performed to examine the interaction effects between low self-control and MIL on IGD symptoms, school commitment, and family functioning.

Results

All scales showed satisfactory model fit and scalar measurement invariance by sex. Males showed significantly greater IGD symptoms and lower levels of self-control (Cohen d=0.25-1.20, P<.001) than females. IGD symptoms were significantly and positively associated with impulsivity (β=.20, P=.01), temper (β=.25, P<.001), and search for meaning (β=.11, P=.048) and significantly and negatively associated with presence of meaning (β=–.21, P<.001). Presence of MIL and impulsivity showed a significant and negative interaction effect (β=–.11, SE .05; P=.03) on IGD symptoms. The positive effect of impulsivity on IGD symptoms was stronger among adolescents with low presence of MIL than those with high presence of MIL. Temper showed significant and positive interaction effects with presence of MIL (β=.08, SE .04; P=.03) and search for MIL (β=.08, SE .04; P=.04) on family functioning. The negative effects of temper on family functioning were stronger among adolescents with low levels of MIL than among those with high levels of MIL.

Conclusions

This study provides the first findings on the interaction effects between low self-control and presence of MIL and search for MIL on IGD symptoms and functioning among a large sample of adolescents in rural China. The results have implications for targeted interventions to help male adolescents with lower self-control and presence of meaning.
Exploring the Perspectives of Older Adults on a Digital Brain Health Platform Using Natural Language Processing: Cohort Study
Authors: Ding Huitong , Gifford Katherine , Shih Ludy C , Ho Kristi , Rahman Salman , Igwe Akwaugo , Low Spencer , Popp Zachary , Searls Edward , Li Zexu , Madan Sanskruti , Burk Alexa , Hwang Phillip H , Anda-Duran Ileana De , Kolachalama Vijaya B , Au Rhoda , Lin Honghuang
Published: September 2024

Background

Although digital technology represents a growing field aiming to revolutionize early Alzheimer disease risk prediction and monitoring, the perspectives of older adults on an integrated digital brain health platform have not been investigated.

Objective

This study aims to understand the perspectives of older adults on a digital brain health platform by conducting semistructured interviews and analyzing their transcriptions by natural language processing.

Methods

The study included 28 participants from the Boston University Alzheimer’s Disease Research Center, all of whom engaged with a digital brain health platform over an initial assessment period of 14 days. Semistructured interviews were conducted to collect data on participants’ experiences with the digital brain health platform. The transcripts generated from these interviews were analyzed using natural language processing techniques. The frequency of positive and negative terms was evaluated through word count analysis. A sentiment analysis was used to measure the emotional tone and subjective perceptions of the participants toward the digital platform.

Results

Word count analysis revealed a generally positive sentiment toward the digital platform, with “like,” “well,” and “good” being the most frequently mentioned positive terms. However, terms such as “problem” and “hard” indicated certain challenges faced by participants. Sentiment analysis showed a slightly positive attitude with a median polarity score of 0.13 (IQR 0.08-0.15), ranging from –1 (completely negative) to 1 (completely positive), and a median subjectivity score of 0.51 (IQR 0.47-0.53), ranging from 0 (completely objective) to 1 (completely subjective). These results suggested an overall positive attitude among the study cohort.

Conclusions

The study highlights the importance of understanding older adults’ attitudes toward digital health platforms amid the comprehensive evolution of the digitalization era. Future research should focus on refining digital solutions to meet the specific needs of older adults, fostering a more personalized approach to brain health.
Learnings from Implementing the H&P 360 in Three Medical Institutions: Usability Study (Preprint)
Authors: Hayer Rupinder , Tang Joyce , Bisschops Julia , Schneider Gregory , Kirley Kate , Khan Tamkeen , Rieger Erin , Walford Eric , Anderson Irsk , Press Valerie , Williams Brent
Published: September 2024

BACKGROUND

The traditional History and Physical (H&P) provides the basis for physicians’ data gathering, problem formulation, and care planning, yet can miss relevant behavioral or social drivers of health. The “H&P 360,” a modified H&P, has been shown to foster information gathering and patient rapport in inpatient and OSCE encounters. It prompts students to explore seven domains - biomedical problems; psychosocial problems; patients’ priorities and goals; behavioral history; relationships; living environment and resources; and functional status - as appropriate to the clinical context.

OBJECTIVE

The goal of this study was to examine the perceived utility of the H&P 360 outside of standardized patient setting.

METHODS

Three institutions implemented the H&P 360 in different clinical settings. Of the 207 student participants, 18 were pre-clerkship, 126 were clerkship, and 63 were post-clerkship. Three to eight months after implementation, we administered a student survey with 14 Likert-type (1=strongly disagree to 5=strongly agree) and three free text-response items querying utility.

RESULTS

Overall student response rate was 30%. Among all students, mean ratings on the three utility survey items ranged from 4.03 to 4.24. The five impact on patient care items had mean ratings of 3.88 to 4.24. Mean ratings for the two student learning items were 4.10 and 4.16. Students’ open-ended comments were generally positive and expressed a perceived value in obtaining a more complete contextual picture of the patients’ conditions and support for the utility of the H&P 360. Survey response patterns varied across institutions and learner levels.

CONCLUSIONS

Our findings show that utilizing the H&P 360 can promote information gathering critical for chronic disease management, especially around social drivers of health. As a new standard, the H&P 360 may have clinical utility for revealing and addressing health inequities. Future work should measure effects on patient care and outcomes.

CLINICALTRIAL

N/A
Cool Solutions in Hot Times: The Case for Digital Health in Heatwave Action Plans (Preprint)
Authors: Loureiro Maria Daniel , Jennings Neil , Lawrance Emma , Ferreira-Santos Daniela , Neves Ana Luísa
Published: September 2024

UNSTRUCTURED

As climate change drives increasingly severe heatwaves, the strain on public health systems continues to grow, particularly for vulnerable populations. Our work argues for the integration of digital health technologies into heatwave action plans, drawing lessons from the COVID-19 pandemic's success in deploying such tools. It explores the potential of digital communication strategies, telemedicine, and data-driven simulations to enhance public awareness, maintain healthcare accessibility, and improve real-time crisis responses. Despite their effectiveness, digital solutions remain underutilized in existing European heat-health action plans. We emphasize the need for a proactive, systems-based approach to optimize heatwave management and ensure equitable healthcare access, particularly for at-risk communities. Integrating digital health innovations can transform heatwave response strategies, making them more flexible, efficient, and capable of saving lives.
Estrategias de enseñanza rural para el relevo generacional. La experiencia de los Laboratorios Territoriales de la Universidad de Antioquia
Authors: Aguilar-Marín Vanessa , Guerrero Lobo Leonardo Fabio , Chiquillo Acevedo Yuliana Andrea , Sanmiguel David Silvia , Arias Sánchez Laura , Guacaneme-Barrera Carmen Milena , Cerón-Muñoz Mario Fernando
Published: September 2024

Fortalecer el relevo generacional en las comunidades campesinas es una de las maneras que tiene la universidad colombiana, a través de sus programas de extensión, de responder a las consecuencias del conflicto armado, a la escasez de oportunidades y a la falta de motivación para quedarse en el campo dada la baja rentabilidad de la actividad agropecuaria. Con las herramientas y las estrategias de los Laboratorios Territoriales de la Universidad de Antioquia, y con la experiencia de su implementación en los municipios de Necoclí y Caucasia, queremos invitar a nuestros lectores a descubrir las transformaciones de las personas y de las familias que participaron en nuestros laboratorios, así como los logros que alcanzaron al mitigar los estereotipos relativos al campo y al fortalecer los lazos familiares a partir de la consolidación de sus proyectos de vida.
Soledad y fragmentación. El cine de José María Arzuaga
Authors: Zapata Restrepo Brayan
Published: September 2024

El acercamiento formal de esta investigación no se limita a la obra del director, sino que tiene en cuenta el discurso que se ha establecido a su alrededor, el cual se hace inseparable de la obra misma . Así pues, de manera retrospectiva, es posible analizar cómo se ha construido dicho discurso y cómo se ha transformado con el paso del tiempo. En este punto vale la pena traer a colación al pensador francés Georges Didi-Huberman, quien destaca el valor anacrónico de la historia del arte al expresar que las imágenes no solo pertenecen al tiempo de su creación, sino también a los distintos tiempos de su recepción, señalando incluso que llevan en sí mismas los rastros de un pasado anterior y de otra infinidad de tiempos que se acumulan alrededor suyo . En ese sentido, el análisis formal de la obra de Arzuaga permite no solo establecer relaciones con el discurso construido a su alrededor, sino también con el contexto de su producción y el cine que se desarrollaba en Colombia en la época en que realizó su filmografía. Además, también se enlaza con toda una tradición cinematográfica y artística de la cual el autor es heredero y toma referencias ineludibles.
Curso de física moderna
Authors: Pérez Waltom Santiago , Muñoz Hernández Luis Alfredo , Valencia Balvín Camilo
Published: September 2024

Estas notas son el resultado del diseño y preparación durante varios años del curso Física Moderna que los autores han impartido en los programas de ingeniería Electrónica y Telecomunicaciones del Instituto Tecnológico Metropolitano-ITM, Medellín, Colombia. Los autores, de una manera cuidadosa, han tratado de desarrollar los principales conceptos que dieron origen a la mecánica cuántica, su posterior desarrollo y sus diferentes aplicaciones. Además, han solucionado un conjunto importante de ejercicios, comenzando con situaciones que involucran los diferentes fenómenos que dieron origen a la mecánica cuántica, siguiendo con aplicaciones de la ecuación de Schrodinder (por simplicidad, el desarrollo se realiza únicamente en una dimensión), paquetes de onda y operadores, continuando con aplicaciones de la física estadística y terminando con una introducción a la física del estado sólido. También, han propuesto una cantidad apropiada de ejercicios los cuales pueden ser abordados por los estudiantes usando los diferentes contenidos desarrollados a través de estas notas.
O processo de criação na publicidade: perspectivas de criativos em foco
Authors:   , Martins Bruno Antonio da Silva
Published: September 2024

A presente pesquisa tem como tema o processo de criação em publicidade e é guiada pela hipótese de que este processo compartilha especificidades com o processo de criação da ciência e da arte. Com o objetivo geral de compreender o processo de criação em publicidade e os específicos de explicitar aproximações entre ciência e arte, com foco no processo de criação; mostrar como crenças sobre a velhice e o envelhecimento se apresentam na produção publicitária; tratar a publicidade como um sistema de signos, na perspectiva da semiótica peirceana, e destacar facetas do processo de criação em publicidade, aplicam-se estratégias advindas da semiótica peirceana para análise de peças publicitárias que envolvem representações de idosos, de uma amostra de interesse composta por cinco peças publicitárias recentes. Tais análises são permeadas por ideias de profissionais envolvidos no processo de criação dessas peças, coletadas por meio de entrevistas semi-estruturadas. As reflexões sobre o processo de criação, na ciência e na arte, fundamentam-se em ideias de cientistas e artistas, como consta em literatura específica sobre processo de criação – Moles, Valéry, Morin e Ostrower, entre outros –; em seguida, em ideias de criativos, coletadas nas entrevistas, sendo que os vínculos do processo de criação com a cognição são efetivados com ideias peirceanas sobre os tipos de raciocínio. Entre os resultados, destacamos que os processos de criação na ciência e na arte, bem como na publicidade, em geral, envolvem a busca e a elaboração de procedimentos e técnicas que dependem de materiais existentes; os momentos de criação são conscientes e concentram comparações, conjeturas, hipóteses, ou seja, envolvem o raciocínio abdutivo; dependem do meio cultural dos artistas, cientistas e criativos, e não são processos levados adiante individualmente, pois ambos requerem comunidades tanto para a criação como para a validação dos resultados obtidos. Trata-se de uma pesquisa pertinente à área de concentração Mídias e à linha de pesquisa Análise de processos e produtos midiáticos e relevante pedagogicamente, pois traz contribuições para a compreensão do processo de criação e da criatividade como uma faceta da cognição e, socialmente, pois dá subsídios para os criativos redimensionarem a sua prática relativa ao processo de criação em publicidade, atrelando o original à possibilidade de transformações de crenças e hábitos cristalizados no meio social.
O processo de construção de significados da cor preta via representações visuais no jornal Folha de S. Paulo e em peças publicitárias
Authors:   , Malagó Graziella Andreia
Published: September 2024

Esta pesquisa, que tem como tema a construção de significados da cor preta, é guiada pela questão: como se dá o processo de construção de significados da cor preta via representações visuais no jornal e na publicidade? Assim, o objetivo geral é contribuir para a compreensão do processo de construção de significados da cor preta, e os objetivos específicos constituem em explicitar o conceito de midiatização, descrever aspectos do processo de construção social da cor preta, inventariar significados engendrados pelas representações visuais selecionadas e as implicações na identificação do caminhar do processo de construção da identidade cultural de pessoas pretas. Para tanto, a fundamentação teórica envolve conceitos de midiatização, aspectos do processo de construção social da cor preta, enquanto as estratégias de análise de representações visuais, advindas da semiótica peirceana, serão aplicadas para uma amostra de interesse, constituída com representações visuais vindas da Folha de S.Paulo, do ano de 2020, e de peças publicitárias do ano de 2021, coletadas nos portais da ADS of the Word – Creative Advertising Community e do Clube de Criação. Dentre os resultados, destacamos que para as peças publicitárias prevalece o poder de sugestão, que pode gerar efeitos emocionais, sendo, portanto, mais profícuas para colocar em movimento novas ideias, crenças, ações e hábitos, no transcorrer do tempo, ou em semioses futuras relativas à cor preta. Esta pesquisa é relevante por tratar do processo de construção de significados em torno da cor preta tendo as mídias como protagonistas, bem como por fornecer subsídios para que produtores/criadores se sensibilizem quanto à qualidade da composição de seus produtos/criações que envolvam a cor preta.
The Supporting Emerging Adults With Diabetes (SEAD) Program: An Adult-Based Real-World Clinical Model That Improves Hospitalizations, Diabetes Technology Uptake, and Glycemic Outcomes in Underserved Young Adults With Type 1 Diabetes
Authors: Agarwal Shivani , Mathias Priyanka , Schechter Clyde , Finnan Molly , Greenberg Michael , Leung Stephanie L. , Movsas Sharon , Long Judith A.
Published: September 2024

OBJECTIVE

Underserved young adults (YA) with type 1 diabetes (T1D) experience the worst outcomes across the life span. We developed and integrated the Supporting Emerging Adults with Diabetes (SEAD) program into routine endocrinology care to address unmet social and medical challenges.

RESEARCH DESIGN AND METHODS

This study was designed as a longitudinal cohort study, with prospective data collection over 4 years on YA in SEAD compared with usual endocrine care. We used propensity-weighted analysis to account for differences in baseline characteristics, and multivariate regression and Cox proportional hazard models to evaluate change in outcomes over time. Primary outcomes included incidence of hospitalizations, diabetes technology uptake, and annual change in HbA1c levels.

RESULTS

We included 497 YA with T1D in SEAD (n = 332) and usual endocrine care (n = 165); mean age 25 years, 27% non-Hispanic Black, 46% Hispanic, 49% public insurance, mean HbA1c 9.2%. Comparing YA in SEAD versus usual care, 1) incidence of hospitalizations was reduced by 64% for baseline HbA1c >9% (HR 0.36 [0.13, 0.98]) and 74% for publicly insured (HR 0.26 [0.07, 0.90]); 2) automated insulin delivery uptake was 1.5-times higher (HR 1.51 [0.83, 2.77]); and 3) HbA1c improvement was greater (SEAD, −0.37% per year [−0.59, −0.15]; usual care, −0.26% per year [−0.58, 0.05]).

CONCLUSIONS

SEAD meaningfully improves clinical outcomes in underserved YA with T1D, especially for publicly insured and high baseline HbA1c levels. Early intervention for at-risk YA with T1D as they enter adult care could reduce inequity in short and long-term outcomes.