bluuebunny/crossref_metadata_2025 huggingface dataset:
La financiación colectiva o crowdfunding: conceptos, aplicaciones y retos emergentes en el ámbito militar
Authors: Useche Alejandro J. , Juárez Fernando
Published: May 2024

La cuarta revolución industrial ha generado cambios disruptivos en la actividad financiera, propios del denominado segmento fintech. Dentro de este campo, la financiación colectiva o crowdfunding se presenta como un mecanismo novedoso para la financiación de iniciativas privadas o sociales, incluyendo algunas relacionadas con el ámbito de las fuerzas militares. La revisión de la evidencia internacional muestra que, a pesar de que las actividades militares son financiadas por presupuestos públicos, la financiación colectiva ha resultado útil para la consecución de recursos en áreas como la atención de los veteranos y el fomento de sus iniciativas de emprendimiento.
Dine in or Takeout? Trends on Restaurant Service Demand amid the COVID-19 Pandemic
Authors: Shi Linxuan , Xu Zhengtian
Published: May 2024

The COVID-19 pandemic has caused unprecedented damage to restaurant businesses, especially indoor dining services, because of the widespread fear of coronavirus exposure. In contrast, the online food ordering and delivery services, led by DoorDash, Grubhub, and Uber Eats, filled in the vacancy and achieved explosive growth. As a result, the restaurant industry is experiencing dramatic transformations under the crossfire of these two driving forces. However, these changes are not fully exposed because of the lack of firsthand data, let alone their potential consequences and implications. This study, thus, leverages foot traffic data to reveal and understand the trends of restaurant service demand through the pandemic. We devise a mixture model to decompose the aggregate foot traffic by dwelling time patterns into dine-in and takeout volumes. The transitions of demand structures are then identified for various restaurant sectors by service types, price levels, and locations. We observe that limited-service and budget restaurants saw a significantly faster recovery than full-service counterparts given their comparative advantages in adapting toward takeout channels. But, in the long run, our results suggest more robust demands for dine-in services at full-service restaurants, particularly those that provide more premium dining experiences. Comparatively, the off-line channels at limited-service restaurants appeared vulnerable to the cannibalization from online ordering and delivery channels, which strengthened even after society moved out of lockdown. Regionally, exurban restaurants seem to trend toward the takeout mode, whereas urban areas did not see a notable modal migration between dine-in and takeout from restaurants.
Estimating Markov Chain Mixing Times: Convergence Rate Towards Equilibrium of a Stochastic Process Traffic Assignment Model
Authors: Iryo Takamasa , Watling David , Hazelton Martin
Published: May 2024

Network equilibrium models have been extensively used for decades. The rationale for using equilibrium as a predictor is essentially that (i) a unique and globally stable equilibrium point is guaranteed to exist and (ii) the transient period over which a system adapts to a change is sufficiently short in time that it can be neglected. However, we find transport problems without a unique and stable equilibrium in the literature. Even if it exists, it is not certain how long it takes for the system to reach an equilibrium point after an external shock onto the transport system, such as infrastructure improvement and damage by a disaster. The day-to-day adjustment process must be analysed to answer these questions. Among several models, the Markov chain approach has been claimed to be the most general and flexible. It is also advantageous as a unique stationary distribution is guaranteed in mild conditions, even when a unique and stable equilibrium does not exist. In the present paper, we first aim to develop a methodology for estimating the Markov chain mixing time (MCMT), a worst-case assessment of the convergence time of a Markov chain to its stationary distribution. The main tools are coupling and aggregation, which enable us to analyse MCMTs in large-scale transport systems. Our second aim is to conduct a preliminary examination of the relationships between MCMTs and critical properties of the system, such as travellers’ sensitivity to differences in travel cost and the frequency of travellers’ revisions of their choices. Through analytical and numerical analyses, we found key relationships in a few transport problems, including those without a unique and stable equilibrium. We also showed that the proposed method, combined with coupling and aggregation, can be applied to larger transport models.

History: This paper has been accepted for the Transportation Science Special Issue on the 25th International Symposium on Transportation and Traffic Theory.

Funding: This study was financially supported by the Japan Society for the Promotion of Science [Grant-in-Aid 20H00265].

Supplemental Material: The online appendices are available at https://doi.org/10.1287/trsc.2024.0523 .
Move to improve physical and mental health
Authors: Williams Vicki
Published: May 2024

In this editorial, Vicki Williams discusses the theme of the upcoming mental health awareness week, as well as the Mental State of the World Report and personal independent payments
Two new species of the genus Xanthonomus Bernhauer, 1926 from Indonesia and Malaysia (Coleoptera: Staphylinidae: Omaliinae: Omaliini)
Authors: SHAVRIN ALEXEY
Published: May 2024

Two new species of the genus Xanthonomus Bernhauer, 1926 are described and illustrated: X. floricola sp. nov. (Indonesia: Sulawesi) and X. pandani sp. nov. (Malaysia: Sabah). Based on the general shape of the pronotum and very wide abdomen, both species are related to X. latus Steel, 1995 (Malaysia: Pahang). The holotype of X. latus is illustrated. The distributional map of the genus is provided.
AUTOLOGOUS MATRIX-INDUCED CHONDROGENESIS (AMIC)-AIDED RECONSTRUCTION OF OSTEOCHONDRAL LESIONS OF THE TALUS: FIVE-YEAR FOLLOW-UP
Authors: Wiewiorski M. , Barg A. , Valderrabano V.
Published: May 2024

Introduction

Autologous Matrix Induced Chondrogenesis (AMIC) for surgical treatment of osteochondral lesions of the talus (OCLT) has shown excellent clinical and radiological results at short term follow up two years after surgery. However, no mid-term follow up data is available.

Aim

1. To evaluate the clinical outcome after AMIC-aided reconstruction of osteochondral lesions of the talus at a minimum follow up time of five years. 2. To evaluate the morphology and quality of the regenerated cartilage by magnetic resonance imaging (MRI) at on at a minimum follow up time of five years.

Methods

Seventeen patients prospectively underwent surgery receiving a AMIC-aided repair of OCLT consisting of debridement, autologous grafting, and sealing of the defect with a collagen scaffold (Chondro-Gide, Geistlich Surgery, Wolhusen, Switzerland). Clinical and radiological assessment was performed before and after a minimum of 60 months after surgery (average 78 months, range, 60–120). Clinical examination included the American Orthopaedic Foot & Ankle Society (AOFAS) ankle score and the Visual Analogue Scale (VAS). Radiological imaging consisted of MRI. The Magnetic Resonance Observation of Cartilage Repair Tissue (MOCART) score was applied.

Results

The AOFAS ankle score improved significantly from a mean of 60 points preoperatively (range, 17–79) to 91 points (range, 70–100) postoperatively (p< 0.01). The preoperative pain score averaged a VAS of 5 (range, 2–8), improving to an average of 1.1 (range 0–8) (p< 0.01). The MOCART score for cartilage repair tissue on postoperative MRI averaged 71 points (range, 50–90).

Conclusion

The AMIC-procedure is safe for the treatment of OCLT with overall good clinical and magnetic resonance imaging results at five years follow up.
BIOPATCH GRAFTING OF LARGE OR RECALCATRANT OSTEOCHONDRAL DEFECTS OF THE TALUS
Authors: Cruickshank J. , Eyre J.
Published: May 2024

Introduction

Large osteochondral defects (OCD) of the talus present a difficult management conundrum. We present a series of Maioregen xenograft patches applied through an open approach, early lessons from the technique and good early outcomes, in patients who are otherwise looking at ankle salvage techniques.

Results

16 patients underwent open patch procedures, performed by a single surgeon, over a 30 month period. 12 males, and 4 females with age at presentation from 21–48. The majority were young, male, in physical employment with active sporting interest. MoxFQ, and E5QD were collected preop, 3, 6, 12 month postoperatively. There were significant improvements in ROM, pain, and scores in the cohort. 3 cases returned to Theatre, 1 for a concern about late infection, which settled with good outcome, and a further 2 with metalwork / adhesions.

Conclusion

Early results suggest that this patch technique may be useful in prolonging the longevity of the TTJ, where micro fracture has failed, or the lesion is so large that it would likely be futile. Patients rescoped demonstrated good integration of the patch material, with stability and functional improvement. There may be a place for this technique in the management of large lesions, particularly in young patients where preservation is desired over joint salvage.
OUTCOME OF TRANSMETATARSAL AMPUTATIONS IN PATIENTS WITH DIABETES MELLITUS: A MULTIDISCIPLINARY FOOT CARE SERVICE APPROACH
Authors: Humphrey J.A. , Kanthasamy S. , Coughlin P. , Coll A. , Robinson A.H.N.
Published: May 2024

Aim

This retrospective case series reports the reoperation, major amputation, survival rates and mobility status in diabetic patients who underwent a trans-metatarsal amputation (TMA) managed within a multi-disciplinary diabetic foot care service.

Methods and patients

Forty-one consecutive patients (37 men, 4 women) underwent a TMA between January 2008 to December 2017. They were retrospectively reviewed. The mean age at the time of surgery was 63 years (range 39 – 92).

Results

Eighty-eight per cent (36/41) of the patients were followed-up. Four (11%) of the 36 patients required reoperation, including three major amputations (8%). All the patients requiring a reoperation were vasculopaths. The four-year patient survival rate following a TMA was 69% (25/36). Ninety-six per cent (21/22) of the surviving patients not requiring revision to a major amputation were fully mobile in bespoke orthoses, of whom a third required a stick.

Conclusion

This study shows that transmetatarsal amputation in patients with diabetes, managed in a multi-disciplinary diabetic foot care service, is effective for limb salvage.
MULTICENTRE RANDOMIZED CONTROLLED STUDY OF SUBTALAR ARTHRODESIS USING ALLOSTEM VERSUS AUTOLOGOUS BONE GRAFT
Authors: Coetzee C. , Myerson M. , Anderson J. , McGaver R. Stone
Published: May 2024

Introduction

AlloStem/Cellular Bone Allograft and autologous bone graft are accepted methods for managing hindfoot degenerative arthritis. The purpose was to evaluate outcomes of AlloStem and autograft in subtalar arthrodesis and compare overall fusion rates.

Methods

This study was conducted in IRB compliance. Patients between 18–80 years who qualified for a subtalar fusion were randomized 1:1 to AlloStem or autologous graft. The AOFAS hindfoot ankle scale, FFI-R and SF-12 were collected pre-operatively, 6 weeks, 3 & 6 months, 1 and 2 year. Weight-bearing 3-view ankle X-rays were done at the same intervals. A CT scan was obtained at 6 months.

Results

140 patients were enrolled; 124 patients had surgery(60-AlloStem and 64-Control). Withdrawals included 14 voluntarily before surgery and 2 intra-operative failures. 19 were lost to follow-up. Mean age for AlloStem was 56.69(20.3–79.6) and Autograft was 54.60(20.74–80.07). 59 AlloStem patients completed their 6 month visit and 45 completed 2 years. AOFAS score improved: 40.02 at pre-op to 72.16(6 mo) to 79.51 at 1 year and 80.38 at 2 year. SF-12 improved 58.29 at pre-op to 65.67 at 6 month and 71.59 at 2 year. FFI-R improved 236.88 at pre-op to 203.53 at 6 month 149.93 at 2 year.60 Autograft patients completed their 6 month visit and 51 patients completed their 2 year. AOFAS score improved 42.89 at pre-op to 75.67 (6 mo) to 79.75 at 1 year and 78.62 at 2 year. Autograft SF-12 improved 60.55 at pre-op to 70.40 at 6 month and 75.26 at 2 year. Autograft FFI-R improved 217.16 at pre-op to 166.77 at 6 month and 145.43 at 2 year. AlloStem patients had a mean posterior fusion rate of 28.9% at 6 months whereas the Autograft had 46.3%(p=.049). Non-union rates were AlloStem(9/57)(15.7%) whereas Autograft was 3/60(5%).

Conclusion

AlloStem trended to be inferior to Autologous graft.
AgroGuardian: An All-Terrain Vehicle Crash Detection and Notification System
Authors: Khorsandi Farzaneh , De Moura Araujo Guilherme   , Ferreira Lima dos Santos Fernando  
Published: May 2024

Highlights

Off-road ATV incidents can be problematic due to long EMS alert times.

An ATV crash-detection-and-report system is expected to reduce EMS response time.

The developed system can accurately detect ATV rollovers.

The alert time of our system is 10 times faster than the national U.S. average.

Any rider using our system is 3 times more likely to survive an off-road crash.

Abstract. All-Terrain Vehicle (ATV) incidents are a common cause of injury and death in the agricultural industry in the United States. Many ATV off-road crashes on farms and ranches may result in trauma requiring immediate care, but the injured rider is unable to seek help due to their injuries. Moreover, many of these crashes occur in isolated areas that may be difficult to access and have unreliable cellular phone service, making contact with emergency medical services (EMS) challenging. This study aimed at developing and testing a low-cost ATV crash detection device (AgroGuardian) that immediately alerts EMS and emergency contacts, even when the rider is unable to take action and/or there is no cellular phone service available. AgroGuardian includes an embedded data logging system, a smartphone application, and a remote database. The embedded system includes an Inertial Measurement Unit (IMU) for attitude estimation, a Global Positioning System (GPS) for location estimation, and a Rock7 modem for off-board communication. A smartphone application was developed for the users to input information about their vehicle (e.g., make and model) and emergency contacts. Also, it allows them to interact with their ATV data. An emergency signal along with the ATV’s coordinates is transmitted through the Rock7 modem and received in the remote database when a rollover is detected by the system. This emergency signal is then processed and sent to EMS and emergency contacts. Our results indicated that the device: (1) is unlikely to miss an ATV rollover; (2) has a fast EMS notification time (40.7 s); and (3) the ATV localization system presented an average error of 2.34 m. Keywords: ATV, EMS alert time, Farm, Off-road incidents, Quadbike, Rollover.
Opportunities and risks of using artificial intelligence in primary schools
Authors: Jamiołkowska Ewelina
Published: May 2024

The dynamic development of artificial intelligence as a technical and scientific field is well known to us. On the educational level, we can increasingly see the testing of new technological possibilities. This mainly concerns the sphere of teaching and learning. The aim of this article is to polemicize on the most important opportunities and risks of using artificial intelligence in primary schools. The use of these tools in education opens up new horizons not only for students, but also for teaching staff. In order to benefit from the full potential of the opportunities offered to us, a thoughtful implementation of artificial intelligence in schools is necessary. This will minimize the risk of failure and increase the resources of modern technology.
Cooperation of the family of a child with disability with the school
Authors: Waszczuk Joanna , Nazaruk Stanisława , Spychel Dominika , Lipińska Ewa
Published: May 2024

In the process of upbringing and development of programs and environments for a child with a disability are home, kindergarten, and school. Thanks to them, training a young person to participate in life. However, this is not a task, so be careful and deliberately influence the main subjects of education. Referring to the description, a research project was developed, the main purpose of which was to describe the cooperation of teachers and parents of a child with a disability. Research of teachers at secondary schools where teaching is special education. The result of the undertaken searches is the obtained research, saying that there is a social action that affects the results of the family and school is needed, in addition, better prepare the child for life in changing social conditions, in the new shaping of reality and in the game that enters into the need of man.
Study on dynamic response characteristics of the scanning angle in a liquid crystal cladding waveguide beam scanner
Authors: Bi Zekun , Diao Zhihui , Wang Yuqing , Chen Ao , Zhao Huiru , Liu Yonggang , Peng Zenghui , Yang Chengliang , Li Dayu , Mu Quanquan
Published: May 2024

This paper studies the dynamic response characteristics of the scanning angle in a liquid crystal cladding waveguide beam scanner. Based on liquid crystal dynamic theory, finite element analysis and vectorial refraction law, a dynamic response calculation model of scanning angle is constructed. The simulation results show that the dynamic responses of the scanning angle during the electric field-on and field-off processes are asymmetric, and exhibit “S”-shape and “L”-shape changing trends, respectively. In addition, by comparing with the bulk phase modulation response process of traditional liquid crystal devices, the intrinsic physical reason for the rapid light regulation of the liquid crystal cladding waveguide beam scanner is clarified to be that the liquid crystal close to the core layer has a faster rotation speed during the electric field-off process. Moreover, the liquid crystal cladding waveguide beam scanner is experimentally tested, and the experiment results are in good agreement with theoretical simulations.
Sources of exposure to non-tobacco nicotine electronic nicotine delivery systems and associations with susceptibility to use and use behaviors among young adults in the United States
Authors: Li Wei , Kong Grace , Davis Danielle R. , Bold Krysten W. , Krishnan-Sarin Suchitra , Camenga Deepa R. , Morean Meghan E.
Published: May 2024

Introduction

The Electronic Nicotine Delivery Systems (ENDS) industry recently introduced non-tobacco nicotine (NTN), which is not tobacco-derived and is often marketed as “tobacco-free nicotine.” Given its novelty, it is important to understand where young adults learn about NTN ENDS. This study examined sources of exposure to NTN ENDS and relationships with NTN ENDS use and susceptibility.

Methods

We analyzed online survey data collected in Fall 2021 from 642 young adults (18–25 years) who had heard of NTN ENDS. We assessed 9 sources of NTN ENDS exposure (e.g., retail stores, social media) and examined associations between sources of exposure and NTN current (past-month) use, lifetime (non-current) use, and susceptibility to use, adjusting for demographics and other tobacco product use.

Results

Participants reported current NTN ENDS use (37.4%), lifetime use (12.0%), susceptibility (18.5%), or no susceptibility to use (32.1%). The most common sources of NTN ENDS exposure were retail stores (87.7%) and social media (81.0%). Exposure to NTN ENDS via social media was associated with greater odds of current NTN ENDS use (vs. no susceptibility) (aOR = 1.83, 95%CI: 1.02–3.28). Exposure via online streaming platforms was associated with greater odds of current (aOR = 1.75, 95%CI: 1.08–2.82) and lifetime NTN ENDS use (aOR = 2.42, 95%CI: 1.25–4.68).

Conclusions

Young adults were exposed to and learned about NTN ENDS from diverse sources, primarily retail shops and social media. Further, exposure via social media and streaming platforms were associated with NTN ENDS use. Future studies should explore the content of NTN information from various sources to inform prevention efforts.
Numerical investigation of fluid flow behavior in steel cord with lattice Boltzmann methodology: The impacts of microstructure and loading force
Authors: Zhao Chaojie , Jin Yanxin , Fan Chaobin , Yang Jun , Wang Rui , Cao Yang
Published: May 2024

Steel cord materials were found to have internal porous microstructures and complex fluid flow properties. However, current studies have rarely reported the transport behavior of steel cord materials from a microscopic viewpoint. The computed tomography (CT) scanning technology and lattice Boltzmann method (LBM) were used in this study to reconstruct and compare the real three-dimensional (3D) pore structures and fluid flow in the original and tensile (by loading 800 N force) steel cord samples. The pore-scale LBM results showed that fluid velocities increased as displacement differential pressure increased in both the original and tensile steel cord samples, but with two different critical values of 3.3273 Pa and 2.6122 Pa, respectively. The original steel cord sample had higher maximal and average seepage velocities at the 1/2 sections of 3D construction images than the tensile steel cord sample. These phenomena should be attributed to the fact that when the original steel cord sample was stretched, its porosity decreased, pore radius increased, flow channel connectivity improved, and thus flow velocity increased. Moreover, when the internal porosity of tensile steel cord sample was increased by 1 time, lead the maximum velocity to increase by 1.52 times, and the average velocity was increased by 1.66 times. Furthermore, when the density range was determined to be 0–38, the pore phase showed the best consistency with the segmentation area. Depending on the Zou-He Boundary and Regularized Boundary, the relative error of simulated average velocities was only 0.2602 percent.
Longitudinal prediction of primary school children’s COVID-related future anxiety in the second year of the pandemic in Germany
Authors: Voltmer Katharina , von Salisch Maria
Published: May 2024

Although research has confirmed that the first COVID-19-related lockdown has increased stress and mental health problems in children, less is known about the longer-term effects of the pandemic on children’s COVID-related future anxiety (CRFA). Because of CRFA’s potentially debilitating effects, risk and resilience factors against this anxiety were investigated. To this end, n = 140 children (49% female) in 3rd and 4th grade classrooms in Germany were asked to perform a working memory task and to self-report about their CRFA and emotion regulation in December 2020 and in May 2021. More maladaptive emotion regulation in December 2020 contributed to the explanation of a high CRFA score in May 2021, whereas a better performance on working memory updating contributed a lower CRFA score later when controls were in place. These results were confirmed when children’s CRFA in December 2020 was included in the prediction of their later CRFA. They suggest that maladaptive strategies of emotion regulation, such as rumination, may explain higher or increasing levels of CRFA, whereas efficient working memory updating may be an indicator of processing information in a way which shields children from CRFA-related thoughts. The concepts underlying these variables should be included in prevention and intervention efforts.
Research on the evolutionary control of unsafe behavior of construction personnel based on multi-field coupled-homogeneous analysis model
Authors: Zhao Haoran , Wang Changfeng , Zheng Qiushuang , Xia Xuefeng , Ouyang Yanmin
Published: May 2024

Unsafe behavior among construction personnel poses significant risks in petroleum engineering construction projects. This study addresses this issue through the application of a multi-field coupled homogeneous analysis model. By conducting case analyses of petroleum engineering construction accidents and utilizing the WSR methodology, the influencing factors of unsafe behaviors among construction personnel are systematically categorized into organizational system factors, equipment management factors, and construction personnel factors. Subsequently, employing Risk coupling theory, the study delves into the analysis of these influencing factors, discussing their coupling mechanisms and classifications, and utilizing the N-K model to elucidate the coupling effect among them. Furthermore, a novel approach integrating coupling analysis and multi-agent modeling is employed to establish an evolutionary model of construction personnel’s unsafe behavior. The findings reveal that a two-factor control method, concurrently reinforcing equipment and construction personnel management, significantly mitigates unsafe behavior. This study provides valuable insights into the evolution of unsafe behavior among construction personnel and offers a robust theoretical framework for targeted interventions. Significantly, it bears practical implications for guiding safety management practices within petroleum engineering construction enterprises. By effectively controlling unsafe behaviors and implementing targeted safety interventions, it contributes to fostering sustainable development within the petroleum engineering construction industry.
Secure UAV adhoc network with blockchain technology
Authors: Alqarni Mohammed A.
Published: May 2024

Recent advances in aerial robotics and wireless transceivers have generated an enormous interest in networks constituted by multiple compact unmanned aerial vehicles (UAVs). UAV adhoc networks, i.e., aerial networks with dynamic topology and no centralized control, are found suitable for a unique set of applications, yet their operation is vulnerable to cyberattacks. In many applications, such as IoT networks or emergency failover networks, UAVs augment and provide support to the sensor nodes or mobile nodes in the ground network in data acquisition and also improve the overall network performance. In this situation, ensuring the security of the adhoc UAV network and the integrity of data is paramount to accomplishing network mission objectives. In this paper, we propose a novel approach to secure UAV adhoc networks, referred to as the blockchain-assisted security framework (BCSF). We demonstrate that the proposed system provides security without sacrificing the performance of the network through blockchain technology adopted to the priority of the message to be communicated over the adhoc UAV network. Theoretical analysis for computing average latency is performed based on queuing theory models followed by an evaluation of the proposed BCSF approach through simulations that establish the superior performance of the proposed methodology in terms of transaction delay, data secrecy, data recovery, and energy efficiency.
Multi-vehicle adaptive 3D mapping for targeted ocean sampling
Authors: Mo-Bjørkelund Tore , Majaneva Sanna , Fragoso Glaucia Moreira , Johnsen Geir , Ludvigsen Martin
Published: May 2024

Expanding spatial presentation from two-dimensional profile transects to three-dimensional ocean mapping is key for a better understanding of ocean processes. Phytoplankton distributions can be highly patchy and the accurate identification of these patches with the context, variability, and uncertainty of measurements on relevant scales is difficult to achieve. Traditional sampling methods, such as plankton nets, water samplers andin-situvertical sensors, provide a snapshot and often miss the fine-scale horizontal and temporal variability. Here, we show how two autonomous underwater vehicles measured, adapted to, and reported real-time chlorophyll a measurements, giving insights into the spatiotemporal distribution of phytoplankton biomass and patchiness. To gain the maximum available information within their sensing scope, the vehicles moved in an adaptive fashion, looking for the regions of the highest predicted chlorophyll a concentration, the greatest uncertainty, and the least possibility of collision with other underwater vehicles and ships. The vehicles collaborated by exchanging data with each other and operators via satellite, using a common segmentation of the area to maximize information exchange over the limited bandwidth of the satellite. Importantly, the use of multiple autonomous underwater vehicles reporting real-time data combined with targeted sampling can provide better match with sampling towards understanding of plankton patchiness and ocean processes.
Design and fabrication of a microstrip triplexer with wide flat channels for multi-band 5G applications
Authors: Yahya Salah I. , Zubir Farid , Abdel Hafez Mohammed , Nkenyereye Lewis , Chaudhary Muhammad Akmal , Assaad Maher , Nouri Leila , Rezaei Abbas , Jizat Noorlindawaty Md
Published: May 2024

In this paper, a new microstrip triplexer is designed to work at 2.5 GHz, 4.4 GHz and 6 GHz for mid-band 5G applications. All channels are flat with three low group delays (GDs) of 0.84 ns, 0.75 ns and 0.49 ns, respectively. Compared to the previously reported works, the proposed triplexer has the minimum group delay. The designed triplexer has 18.2%, 13.7%, 23.6% fractional bandwidths (FBW%) at 2.5 GHz, 4.4 GHz and 6 GHz, respectively. The obtained insertion losses (ILs) are low at all channels. These features are obtained without a noticeable increase in the overall size. A novel and simple resonator is used to design the proposed triplexer, which includes two pairs of coupled lines combined with a shunt stub. A perfect mathematical analysis is performed to find the resonator behavior and the layout optimization. The type of shunt stub is determined mathematically. Also, the smallness or largeness of some important physical dimensions is determined using the proposed mathematical analysis. Finally, the designed triplexer is fabricated and measured, where the measurement results verify the simulations.
Confirmatory factor analysis of the Tinnitus Impact Questionnaire using data from patients seeking help for tinnitus alone or tinnitus combined with hyperacusis
Authors: Aazh Hashir , Moore Brian C. J. , Erfanian Mercede
Published: May 2024

A confirmatory factor analysis (CFA) of the Tinnitus Impact Questionnaire (TIQ) was performed. In contrast to commonly used tinnitus questionnaires, the TIQ is intended solely to assess the impact of tinnitus by not including items related to hearing loss or tinnitus loudness. This was a psychometric study based on a retrospective cross-sectional analysis of clinical data. Data were available for 155 new patients who had attended a tinnitus and hyperacusis clinic in the UK within a five-month period and had completed the TIQ. The mean age was 54 years (standard deviation = 14 years). The TIQ demonstrated good internal consistency, with Cronbach’s α = 0.84 and McDonald’s ω = 0.89. CFA showed that two items of the TIQ had low factor loadings for both one-factor and two-factor models and their scores showed low correlations with scores for other items. Bi-factor analysis gave a better fit, indicated by a relative chi-square (χ2) of 18.5, a Root-Mean Square Error of Approximation (RMSEA) of 0.103, a Comparative Fit Index (CFI) of 0.97, a Tucker Lewis Index (TLI) of 0.92, and a Standardized Root-Mean Residual (SPMR) of 0.038. Total TIQ scores were moderately correlated with scores for the Visual Analogue Scale of effect of tinnitus on life and the Screening for Anxiety and Depression-Tinnitus questionnaire, supporting the convergent validity of the TIQ. The TIQ score was not correlated with the pure-tone average hearing threshold, indicating discriminant validity. A multiple-causes multiple-indicator (MIMIC) model showed no influences of age, gender or hearing status on TIQ item scores. The TIQ is an internally consistent tool. CFA suggests a bi-factor model with sufficient unidimensionality to support the use of the overall TIQ score for assessing the impact of tinnitus. TIQ scores are distinct from the impact of hearing impairment among patients who have tinnitus combined with hearing loss.
Intra-decadal increase in globally-spread Magallana gigas in southern California estuaries
Authors: Wolfe Marah L. , Bowers-Doerning Chelsea M. , Espinosa Anabell , Frantz Ty , Hoese William J. , Lam Joann G. , Lamp Kailee R. , Lyons Rachael A. , Nguyen Justin K. , Keyes Bryce D. , Smith Jada , Suther Holly L. , Swintek Meaghan , Vannordstrand Juliann C. , Zacherl Danielle C.
Published: May 2024

Introduction and establishment of non-indigenous species (NIS) has been accelerated on a global scale by climate change. NIS Magallana gigas’ (formerly Crassostrea gigas’) global spread over the past several decades has been linked to warming waters, specifically during summer months, raising the specter of more spread due to predicted warming. We tracked changes in density and size distribution of M. gigas in two southern California, USA bays over the decade spanning 2010–2020 using randomly placed quadrats across multiple intertidal habitats (e.g., cobble, seawalls, riprap) and documented density increases by 2.2 to 32.8 times at 7 of the 8 sites surveyed across the two bays. These increases in density were coincident with 2–4° C increases in median monthly seawater temperature during summer months, consistent with global spread of M. gigas elsewhere. Size frequency distribution data, with all size classes represented across sites, suggest now-regular recruitment of M. gigas. Our data provide a baseline against which to compare future changes in density and abundance of a globally-spread NIS of significant concern.
Taxonomic distinctness and diversity patterns of a polychaete (Annelida) community on the continental shelf of the Southern Gulf of Mexico
Authors: Quiroz-Martínez Benjamín , Hernández-Alcántara Pablo , Salas de León David Alberto , Solís-Weiss Vivianne , Monreal Gómez María Adela , Álvarez Sánchez León Felipe
Published: May 2024

The spatial patterns of taxonomic diversity of annelid polychaete species from the continental shelf in the Southern Gulf of Mexico were examined in this study. We used taxonomic distinctness and its spatial variations to explore the diversity patterns and how they change between Southern Gulf of Mexico regions. In addition, using taxonomic distinctness as a dissimilarity measure and Ward’s Clustering, we characterized three distinct faunal assemblages. We also investigated patterns of richness, taxonomic distinctness, and distance decay of similarity between sampling stations as a ß-diversity measure. Finally, we examined the spatial relationships between polychaete assemblages and environmental variables to test the relative importance of spatial and environmental components in annelid polychaete community structure from the Southern Gulf of Mexico. We used a combination of eigenvector-based multivariate analyses (dbMEMs) and distance-based redundancy analysis (dbRDA) to quantify the relative importance of these explanatory variables on the spatial variations of taxonomic distinctness. The significance level of spatial and environmental components to the distribution of polychaete species showed that the combined effect of spatial processes and sediment characteristics explained a higher percentage of the variance than those parameters could alone.
ALÉM DO OLHAR: PAISAGENS GEOFOTOGRAFADAS DE ILHÉUS, NO SUL DA BAHIA
Authors: Chiapetti Rita Jaqueline Nogueira , Chiapetti Jorge
Published: May 2024

O objetivo dessa pesquisa é examinar paisagens de Ilhéus, no sul da Bahia, a partir de uma perspectiva geofotográfica como realidades objetivas, considerando seu significado e de que maneira estão carregadas de sentido para seus habitantes. É uma pesquisa qualitativa que tem a fenomenologia como caminho metodológico, como também, essa perspectiva para a análise de cunho geográfico-humanista das paisagens geofotografadas. Quanto aos procedimentos metodológicos, buscamos embasamento teórico-conceitual, selecionamos paisagens ilheenses significativas a partir da nossa experiência no lugar e as analisamos de acordo com a orientação metodológica escolhida. Assim, foram quatro paisagens analisadas: o Morro do Outeiro de São Sebastião, que é considerado o marco inicial da vila de São Jorge dos Ilhéus colônia, portanto, muito importante na história da ocupação portuguesa do lugar. O cacau, que representa o crescimento econômico de Ilhéus, como também, sua vida social, cultural e política, mas, principalmente, o modo de vida dos seus habitantes. A Catedral de São Sebastião, que simbolizou a riqueza do lugar no passado e a grande fé católica dos ilheenses até hoje. O escritor Jorge Amado, que divulgou mundialmente a cultura singular da paisagem cacaueira regional, escrevendo seus romances com o enredo guiado pelo cacau e inspirado pelos habitantes, lugares, coisas, acontecimentos, enfim, pela cultura urbano-regional cacaueira.
Uma re-visita e uma re-memória dos encontros com Brandão e a Antropologia
Authors: Souza Angela Fagna Gomes de
Published: May 2024

Esta proposta tem a intenção de resgatar memórias, re-visitar tempos outros, momentos de descobertas, mergulhos e novas paragens onde, como geógrafa de formação, assentei-me na Antropologia de uma forma, a princípio despretensiosa, mas que foi ao longo dos anos tornando-se meu sustentáculo. Me vi envolvida em nuances, até então desconhecidas, que me instigaram a mergulhar, cada vez mais e de forma mais profunda, neste universo. Foi com o professor Carlos Rodrigues Brandão e adentrando no universo da Antropologia que compreendi que a essência e a vivência da pesquisa estão na forma como a conduzimos. Com a Geografia aprendi que “é preciso também ser consciente da importância fundamental do trabalho de campo” (Lacoste, 2006, p. 87). Apesar da Geografia sinalizar na direção de uma responsabilidade social enquanto pesquisadores, foi com os ensinamentos de Brandão que eu passei a entender “de fato” o significado deste compromisso para com o “outro”, ou seja, apreender a com-partilhar, a dialogar juntos, a escutar e compreender “um de nós”. Como este despertar foi possível? O que carrego desta trajetória? Como sou e/ou pretendo ser a partir destas experiências vividas e acumuladas? Eis algumas indagações que re-memoro aqui entre imagens e escritos, muitos deles apenas pequenos flashs de um viver que guarda toda a intensidade de cada momento e que me remete a forma como Sou, Estou e vislumbro Permanecer no mundo.
Pensar a docência em espaços dialógicos críticos
Authors: Godoi Evandro de , Rosmann Márcia Adriana , Benvenutti Leonardo Matheus Pagani
Published: May 2024

O presente relato comunica experiências constituídas nos debates que ocorreram no “Fórum de estudos: leituras de Paulo Freire”, um evento itinerante que acontece no Rio Grande do Sul. Com periodicidade anual, ele se divide em círculos temáticos nos quais são discutidas questões pertinentes à educação das classes populares. Neste relato, discute-se a docência e os desafios dela, além das possibilidades existentes a partir de um viés popular. É preciso sensibilizarmo-nos de que a docência deve ser discutida de maneira crítica e radical a partir dos diferentes lugares ocupados pelos sujeitos. A universidade pode ser um desses locais, no momento em que efetiva a indissociabilidade entre ensino, pesquisa e extensão, de forma a criar espaços para que o diálogo, com as demandas, sobretudo das classes populares, aconteça, e que outros projetos de sociabilidade e formação humana sejam gestados.
Percepções das trabalhadoras sexuais acerca da rede de atenção do SUS à luz da mandala dos saberes
Authors: Nascimento Kelly Cristina do , Delgado Flávia Alves , Lima Renata Cristina Beltrão de , Gomes Betânia da Mata Ribeiro
Published: May 2024

A ausência de políticas públicas de saúde voltadas às profissionais do sexo reflete negativamente sobre a equidade em saúde. As trabalhadoras sexuais, desde a origem desta profissão, constituem um grupo historicamente estigmatizado e discriminado por se desviarem do modelo padrão de comportamento social e moralmente estabelecido. Diante do exposto, questiona-se: Quais são as percepções das trabalhadoras sexuais acerca da rede de atenção do Sistema Único de Saúde de Pernambuco? A atividade foi desenvolvida com a participação de doze trabalhadoras sexuais, todas do sexo feminino, na faixa etária entre 18 e 60 anos. Dos resultados, emergiram discussões, relatos e reflexões acerca do conhecimento e atendimento dos profissionais de saúde que fazem a Rede de Atenção à Saúde (RAS). Como o conhecimento acadêmico e empírico desvelado das formações discursivas identificadas, estão: o processo de trabalho em equipe, a realidade estrutural, e a relação entre os extensionistas e as trabalhadoras sexuais no processo educativo.
A produção do conhecimento sobre Internacionalização da Educação Superior na América Latina (2012-2022)
Authors: Nez Egeslaine , Araldi Franciane Maria , Jiménez Diana Erika Cruz , Pasini Juliana F. Serraglio
Published: May 2024

Este estudo teve o objetivo de realizar o mapeamento das produções acadêmicas que exploram o tema Internacionalização da Educação Superior, com base em dissertações, teses brasileiras e artigos de periódicos latino-americanos (2012/2022). O foco ora aprofundado originou-se do estado da arte sobre a temática. Esta pesquisa está vinculado ao projeto de pesquisa intitulado: “Internacionalização da Educação Superior em Contextos Emergentes: descobertas e reflexões”, desenvolvido pelo Grupo de Estudos sobre Universidade (GEU/Unemat/UFMT), sob a coordenação da Universidade Federal do Rio Grande do Sul (UFRGS). Esta revisão tem como metodologia um parâmetro qualitativo que permite visualizar como, na última década, este tema tem ganhado força e interesse por parte de autores/pesquisadores e autoridades educacionais.
Políticas de internacionalização da educação: olhares multidimensionais
Authors: Silva Maria Vieira , Souza Vilma Aparecida de , Souza Raquel Aparecida , Richter Leonice Matilde
Published: May 2024

Internacionalização, Globalização e Mundialização são categorias analíticas que guardam complexidades, singularidades e similaridades. A epígrafe acima, extraída dos escritos do notável geógrafo brasileiro, Mílton Santos, coloca em evidência um dos aspectos que garantem o elo comum entre os mencionados fenômenos: seu caráter não reificado e, portanto, substantivado nas relações sociais com as demandas de quem constrói o espaço geográfico. Historicamente, dimensões espaciais e geográficas tiveram importante papel no processo de acumulação do capital conduzidas por grupos hegemônicos. Karl Marx e Friedrich Engels, há 176 anos, analisaram com precisão as metamorfoses ensejadas pelos novos mercados financeiros e de consumo, permitindo a acumulação capitalista de forma cosmopolita, por meio de fluxos integradores e da flexibilidade geo-política do mundo:
KAJIAN FAKTOR PERILAKU KESEHATAN IBU NIFAS YANG MEMPENGARUHI KUNJUNGAN MASA NIFAS DI INDONESIA
Authors: Zalukhu Junimiserya , Girsang Bina Melvia
Published: May 2024

The phenomenon that occurs in Indonesian society is that there is a gap between the coverage of postpartum visits and the visit standards set by the Indonesian Ministry of Health, namely a minimum of four postpartum visits. The standard of four visits is to maximize the recovery period for the reproductive organs of the postpartum woman. This indicator is the government's effort to provide postpartum maternal health services in accordance with quality standards as an effort to reduce the Maternal Mortality Rate (MMR). The method used in this study was a systematic literature review using the PICOS approach (to determine inclusion and exclusion criteria) and the PRISMA approach (to screen articles). The database used to search for articles is Google Scholar with the help of the Publish or Perish software. The results obtained from the ten research articles, namely, 80% of the articles provide an overview of postpartum visits that still apply three visits, and 60% of the articles provide an overview of the frequency of complete visits which is higher than incomplete visits. The majority of health behavior factors are influenced by predisposing factors, namely attitudes and knowledge. Through this research it is hoped that it can encourage health workers to provide solutions to existing problems related to the lack of coverage of postpartum visits, so that postpartum visits become more optimal in all regions in Indonesia.
EVALUASI KECUKUPAN BANGUNAN PADA AREA PERKANTORAN
Authors: Fajriati Maulia , Rhomadhoni Muslikha Nourma
Published: May 2024

Fire is one of the impacts of potential hazards that often occur in the work area. Every company needs to have an automatic fire prevention and control system that meets fire prevention and control requirements, one of which is the administration of the placement of the number of workers that does not exceed the existing standard limits/rules. This type of research is a case study research that uses quantitative methods using secondary data, the data needed is data on the number of workers and building area in each work area. The results of the study show that the actual number of workers in each work area when compared to the number of people according to the standard, it can be said that they have met the standards that should be except for the 2nd floor of the Foundry office building. Researchers suggest companies to make improvements to all work area buildings to has an emergency response system that meets the requirements of integrated fire prevention and control and does not violate national and international standards.
HUBUNGAN TINGKAT KECUKUPAN GIZI DENGAN KADAR HEMOGLOBIN PADA WANITA PENDAKI GUNUNG
Authors: Ismisari Melly Adya , Kartasurya Martha Irene , Pradigdo Siti Fatimah
Published: May 2024

Pendaki gunung sebagian besar memilih bahan makanan yang dapat diolah secara cepat dan instan tanpa memikirkan kebutuhan nutrisi yang diperlukan saat mendaki gunung. Pendaki lebih banyak membutuhkan nutrisi untuk meningkatkan kadar hemoglobinnya, wanita lebih rentan mengalami defisit hemoglobin dikarenakan wanita harus melewati periode menstruasi setiap bulannya. Penelitian ini bertujuan untuk menganalisis hubungan tingkat kecukupan gizi (protein, zat besi, asam folat, vitamin B12, vitamin A dan vitamin C) dengan kadar hemoglobin pada wanita pendaki gunung. Studi penelitian ini menggunakan desain cross sectional di Basecamp Gunung Prau jalur pendakian Pathak Banteng, dengan jumlah sampel sebanyak 40 orang pendaki wanita yang berusia 15-30 tahun, subjek dipilih menggunakan kriteria inklusi dan ekslusi. Data di kumpulkan dengan melakukan wawancara recall 2x24 jam. Kadar hemoglobin diukur menggunakan alat Quik-Check Hb. Data dianalisis dengan uji korelasi pearson, rank spearman dan regresi linear. Hasil menunjukkan bahwa 28% subjek mengalami anemia. Saat tidak mendaki, subjek memiliki tingkat kecukupan protein (p=0,001) dan zat besi (p=0,001) yang lebih baik daripada saat mendaki. Terdapat hubungan antara tingkat kecukupan zat besi (p=0,008; r=0,417) dan vitamin C (p=0,019; r=0,369) dengan kadar hemoglobin pada wanita pendaki gunung. Tidak terdapat hubungan antara tingkat kecukupan protein, asam folat, vitamin B12, dan vitamin A dengan kadar hemoglobin pada wanita pendaki gunung (p>0,05). Kesimpulan penelitian ini adalah tingkat kecukupan zat besi merupakan variabel yang paling berpengaruh signifikan terhadap kadar hemoglobin (p=0,050).