bluuebunny/crossref_metadata_2025 huggingface dataset:
Generation Of Scaled Long-Period Ship Waves In A Pump-Driven Flume
Authors: CARSTENSEN CHRISTINA , KARL FABIAN , MELLING GREGOR , KONDZIELLA BERNHARD , TRETAU LARS
Published: May 2024

Experimental investigations on the generation of long-period, primary ship waves using a pump-driven technique in a closed-circuit flume are presented. Long-period ship waves can have a major impact on river banks and engineering structures. As larger ship dimensions accompanied by a corresponding rise in loads are expected in the future, the characterisation of long-period ship waves and understanding their impact on bank protection and engineering structures is crucial, especially for appropriate design. Our study combines a closed-loop PID controlled wave generation with a numerical finite difference method (FDM) model. This setup offers the advantage of generating repeatable waves at arbitrary positions along the test section of the laboratory flume. The experiments conducted demonstrate a good reproduction of a scaled long-period ship wave signal (1:10) in a distance of approximately 9 m from the flume inlet. The combination of the PID controlled pump-driven technique with a numerical model provides a solid basis for further studies on ship-induced loads, with the aim to predict future wave loads, better understand the wave-structure-interaction and to mitigate potential damage.
Small-Scale Experiments’ Ability To Augment Large Lab Testing For Designing Nature-Based And Hybrid Solutions For Coastal Flood Hazard Mitigation
Authors: MCMANN DAN , KECK JORDAN , TOMICZEK TORI , LOMONACO PEDRO , COX DAN , LIBBY MARGARET
Published: May 2024

Mangroves and other natural coastal defenses have the potential to augment or replace traditional engineered coastal structures in preventing adverse events such as wave overtopping. Natural, or “green” systems may reduce maintenance costs, reduce sediment erosion, and increase biodiversity compared to traditional “gray” infrastructure built from stone and concrete. To effectively inform the design of hybrid green-gray infrastructure, experimental results must be reliable, but testing at 1:1 scale is time-consuming, expensive, and available at only a few facilities worldwide. This study addresses a knowledge gap in defining the nature of the interactions between green and gray coastal defenses with a focus on overtopping and scaling experimental results. This study will compare data from mangrove-related experiments conducted at scales including 1:2 and 1:8 as part of a collaborative effort between Oregon State University (OSU) and the United States Naval Academy (USNA). The study aims to analyze this data and contribute to the joint compilation of a methodology for designing prototype-scale tests from small-scale experiments to identify the relative importance of friction and scaling effects between prototype and small-scale experiments. Testing conducted at USNA as part of this study included a 1:8 scale, 0.61m-wide (2ft.) flume that replicates the conditions of 1:2 scale experiments at Oregon State University. The experimental setup includes a model Rhizophora mangrove forest placed in front of a seawall, behind which overtopping is measured as volume per unit length either computed from overtopped water weight or directly measured by overtopped volume. Mangroves are modeled as central trunks with stilt roots, as this study focuses on the effects of the root structures on overtopping. Waves generated for the 1:8 experiments include regular waves with heights between 5cm and 10cm and periods between 1 and 2 seconds, scaled according to Froude similitude. Implications of scaled-up measurements of overtopping are also discussed.
ADCP suspended sediment transport monitoring using acoustic particle radius
Authors: JAARSMA R.A.J. , DAUGHARTY M. , KAMMINGA S.D. , VAN DER LUGT M.A. , DE SCHIPPER M.A. , NYLUND S.
Published: May 2024

Monitoring suspended sediment concentration (SSC) can be challenging as direct sampling methods are labour intensive and indirect measurements based on optical or acoustic backscatter are sensitive to changes in particle properties. Regardless, using ADCP backscatter to predict SSC is promising because of the possibility to capture suspended sediment transport by combining with flow measurements. To reduce sensitivity of established backscatter-SSC relations to changing particle size, a methodology is proposed where acoustic particle radius is derived using multi-frequency backscatter measurements obtained with a Nortek Signature1000 ADCP equipped with a vertical beam echosounder. Considering acoustic particle radii in an adapted backscatter-SSC model shows promising improvement in correlations with water sample reference measurements compared to the traditional single frequency approach based on a field test. Follow-up assessment is required to overcome limitations in dataset sample size and to investigate further improvements of the method. Still, application of the method can significantly enhance capability of ADCPs predicting SSC and – since backscatter is recorded over depth in conjunction with flow measurements – the ability to monitor suspended sediment transport using a single instrument.
Concrete Armour Unit Breakwater Physical Model Monitoring With 3D Modeling Tools
Authors: BARS STEVEN LE , LAUNAY TIMOTHEE
Published: May 2024

SEABIM® is a patented scan to BIM process that can generate a reliable and complete 3D model of a rubble-mound breakwater precast protective layer (Xbloc®, Accropode™, Core-loc™ etc.). Using computer vision techniques, the known 3D shape of the Concrete Armour Units (CAU) is detected in a high-resolution point cloud, which allows to obtain the position and orientation of each unit relative to the cloud. By superimposing 3D models produced from different scans at different dates, the movement of each block can then be quantified and represented as a vector.
For natural riprap armours, a point cloud segmentation algorithm is applied. Each rock is identified, and then geometric characteristics of the armour can be computed (apparent rock diameters, placement density), and the movement between each scan can be monitored.
This tool has been applied to numerous real-scale projects since 2019, both in the monitoring of newly built infrastructures and in the asset management phase (Aberdeen South Harbour, Calais port 2015, Nouvelle Route du Littoral etc...). Breakwater physical models in laboratories, in wave flumes or basins, also require monitoring of the movement of reduced-scale blocks between each wave series. With SEABIM® this movement can be computed with accuracy for each CAU, allowing for a consistent evaluation of the armour layer response to wave loads.
The automatic block detection process can be launched on the point cloud from a survey of the initial physical model, obtained either by photogrammetry or LiDAR. Then a new survey is done after each wave series in order to create a sequence of 3D models. Those models can be compared by computing the displacement vectors of the centers of gravity of the units. The vectors can be visualized using color graded arrows within the 3D model. All the information can then be exported to a spreadsheet for further analysis. Using this technique, settlement, rocking and sliding effects can be identified.
In this paper we will discuss in detail the adaptation of the survey techniques from real scale to laboratory projects (difference in scanning technique, scale effect on point cloud density etc.). Then we will explain the 3D modeling process and the applications of the 3D models for engineering analysis purposes.
Rocking Of Single Layer Armour Units Measured By Embedded Sensors
Authors: HOFLAND BAS , HOUTZAGER DAAN , CALDERA GANGA , ANTONINI ALESSANDRO , VAN GENT MARCEL , BAKKER PIETER , VAN DER LEM COCK
Published: May 2024

Single layer randomly placed armour units are used in many rubble mound breakwaters around the world. For these armour layers, breakage of armour units due to rocking could be a major damage mechanism, but no good methods exist to evaluate and quantify rocking. The aim of the study is to quantify the rocking impact velocities for irregularly placed single layer armour units. This study utilizes embedded Rocking Sensors to obtain the first measurements of rocking impact velocities of single layer armour units. More generally, the paper (Hofland et al. 2023) shows how novel measurement techniques can be used for the investigating the stability of single layer armour layers.
A Morphological Assessment On The Effects Of Embankments On Sediment Transport In Sandy Estuaries
Authors: NOTA EISE W. , KLEINHANS MAARTEN G.
Published: May 2024

Many large estuaries around the world are engineered to some degree for both flood protection of coastal communities and maintenance of economically vital shipping routes. Engineering challenges arise due to the highly dynamic morphological nature of estuaries, where the complex processes of sediment transport are driven by an interplay between the turbulent flows of rivers and tides. Naturally, the planforms of sandy estuaries have the tendency to converge landwards exponentially, where deviations from this shape provide alternating space and constrictions where tidal sandbars and channels form (Leuven et al., 2018-a; 2018-b). In the case of embankment by bank protection and dikes, such topographically forced channels can develop deep scour holes that endanger bank stability. Our objective is to study effects of channel and planform dynamics on scour depth variation near protected banks. To this end, we conducted scale experiments of estuaries with completely fixed banks in the tilting tidal flume the Metronome (Kleinhans et al., 2017). We study the effects of these fixed banks on the morphological behaviour of the channel pattern through one experiment, two repeat experiments, and a control without fixed banks. By collection of much longer timeseries than available in nature, we use the experiments to shed light on the topographic forcing and channel dynamics of these systems, and on the repeatability of Metronome experiments.
Wave Pressures Acting On The Pavement Behind The Sloping Revetment
Authors: OH SANG-HO , LEE JOOYEON , JANG SE-CHU
Published: May 2024

A physical experiment was performed to seek an empirical equation predicting the wave force acting on the upper surface of the pavement behind the revetment parapet due to wave overtopping as well as the uplift force acting on the underlayer of the pavement induced by the wave pressure passing through the core layers of the revetment. The experiment was carried out by installing pressure transducers along the upside and downside of the pavement with different configuration of the parapet, water depth, relative freeboard, and armor layer thickness. Then, the wave pressure and force on the pavement was analyzed under various incoming wave conditions. Based on the analysis results, major parameters affecting the wave forces were identified and an empirical equation for evaluating the forces on the pavement is suggested.
Experimental Observations And Prediction Of Wave Attenuation Using A Coral Reef Restoration Approach
Authors: GELDARD JUSTIN , LOWE RYAN J. , GHISALBERTI MARCO , DRAPER SCOTT , ELLWOOD GEORGE , SMITH DAVID , MCARDLE ALICIA
Published: May 2024

The large bottom roughness typical of coral reefs can be effective at reducing wave energy incident to coastlines through the dissipation induced by how wave-driven oscillatory flows interact with the roughness to determine hydrodynamic forces (i.e., drag and inertial). A physical understanding of these fluid-structure interaction processes is essential in designing coral reef restoration projects that can enhance coastal protection as well as deliver other beneficial ecosystem services, as a more sustainable alternative over conventional engineered structures (e.g. breakwaters and seawalls). In this study we quantify both wave attenuation and hydrodynamic forces across progressive stages of a coral reef restoration solution developed by Mars Sustainable Solutions. The Mars Assisted Reef Restoration System (MARRS) involves propagating coral fragments onto hexagonal steel structures called Reef Stars, which are connected in tessellating patterns over degraded reef flats (Figure 1).
Stability Of Estuarine Groyne During Overflowing Long-Period Primary Ship-Induced Waves Based On Laboratory Experiments
Authors: BATENBURG TOBIAS VAN , MEMAR SARGOL , HOFLAND BAS , NAPOLES OSWALDO MORALES , ALYOUSIF AHMAD
Published: May 2024

For the last two decades, significant damage to groyne structures has been observed in the German Elbe estuary. The main reason is the generation of primary ship-induced wave loading. The stern wave of the primary wave system appears as an overflowing over groyne, leading to damage at the crest and lee side of the structure due to the presence of high overflowing flow velocities (Melling et al., 2020). Therefore, overflowing flow velocities and damage were quantified by means of two different experimental setups; the flow experiments and the damage experiment.
The flow experiment involved testing scaled physical models under continuous free-flow conditions. A Particle Image Velocimetry (PIV) setup was used to capture flow velocities at the crest and lee side slope. A dimensionless flow velocity equation is obtained for overflowing flow over groyne structures. The damage experiment assessed the impact of overflowing waves at the crest and lee side on one of the scaled physical models. Measurements were conducted via Structure from Motion principles (SfM) and the damage is expressed in damage parameters S for varying wave heights and freeboard levels. This parameter describes the damage by width-averaged eroded area made dimensionless by the squared nominal stone diameter. Furthermore, the assessment considered the determination of the damage limits (initiation, intermediate, and failure) of a groyne structure for these waves.
The results revealed the relation between the wave height and the freeboard and damage. Furthermore, by regarding the flow velocity explicitly a more fundamental understanding, and more generally applicable design approach might be obtained. The insights gained from this research contribute to an enhanced understanding of groyne behaviour under overflowing long- period ship-induced waves. By highlighting the significance of the flow velocities for waves and freeboard levels, this study provides valuable information for optimizing the design and maintenance of estuarine groynes that are prone to these types of wave-induced loads.
Measurement Of Spatial-Temporal Waves In The Laboratory Using Computer Vision Technolog
Authors: LI CHI-YU
Published: May 2024

Given the complexity of ocean wave phenomena, physical modeling continues to be essential in various engineering and research applications. Wave height, a characteristic measured in nearly all projects, is commonly assessed using resistance/capacitance wave gauges. However, a significant limitation of these traditional wave gauges is their point-based nature, which restricts their ability to describe detailed spatial wave characteristics, especially during wave nonlinearity or when waveforms change. Furthermore, to reconstruct the 3D wave field, an array of wave gauges is often employed alongside an appropriate interpolation algorithm. Additionally, wave gauges may alter flow/wave conditions in specific scenarios. To address these limitations, various non-intrusive measurement techniques have been proposed. Gomit et al. (2022) classified these into stereoscopic, projection, and light-based methods, including LiDAR (Blenkinsopp et al., 2012), RGB-D cameras (Martínez-Aranda et al., 2018), and binocular stereo vision (Li et al., 2022). However, their applicability is constrained by factors such as optical setup complexity and device cost. With the rapid advancement of computer vision technology, it is possible to improve these issues and better describe temporal and spatial wave field variations using such techniques. This conference contribution details the reconstruction of the temporal and spatial 3D free water surface using photogrammetry techniques applied to images from consumer webcams. It also compares these results with measurements obtained from a wave gauge.
Wave Tank Experiments Of A Novel Floating Photovoltaic System
Authors: CLAUS RUBÉN , LÓPEZ MARIO , SOTO FERNANDO , CEBADA ALEJANDRO , CLEMENTE DANIEL , GIANNINI GIANMARIA , ROSA-SANTOS PAULO
Published: May 2024

Solar photovoltaic (PV) energy, alongside other renewables, is expected to lead the energy sector. However, large-scale ground-mounted PV generation requires a significant amount of land, prompting conflict with other uses. On these grounds, floating PV (FPV) technology is gaining interest (Rosa-Clot and Tina, 2020). While commercial FPV is already being deployed on freshwater bodies, efforts are being undertaken towards harnessing solar energy on the untapped surface of the ocean (Oliveira-Pinto and Stokkermans, 2020). The main challenge is to develop a cost-effective technology capable of withstanding extreme environmental conditions whilst ensuring platform stability, to minimize misalignment of the solar panels that could result in significant efficiency loss (Claus and López, 2022). Several marine concepts have been proposed, with most of them leaning towards flexible design strategies, similar to those applied in freshwater (Claus and López, 2023).
Researchers at the University of Oviedo, Spain, are developing a novel FPV system that is specifically designed for marine conditions, following a rigid design approach (Figure 1). The concept leverages the combination of two distinct elements: a double-axis solar tracker, maximizing solar energy generation, and a tension-leg platform (TLP), ensuring structural performance and stability. This research showcases the wave tank experiments, under regular wave action.
Observation Of Ocean Wave Based On Binocular Vision In The Swash Zone Of Yazhou Bay
Authors: YE YIQUN , HE ZHIGUO , Lins YING-TIEN
Published: May 2024

Due to climate change, extreme weather events frequently occur. This can increase the probability of typhoon, resulting in storm surge more frequently. Meanwhile, the severe movement of ocean wave is generated. Ocean wave on the coastal zone can results in retreat of the coastlines and erosion for the beach. The research on the ocean wave in storm surge process based on field observation is not only able to provide the basic data for the validation of numerical model of storm surges but also significant to prevent the loss of beaches resources in the extreme climate condition. The previous studies of swash zone using video technology concentrated on experimental scale (De Vries et al., 2011), and the research parameters mostly focused on bed and water level (Wanek et al., 2006), while there is a lack of the research of ocean wave parameters. The binocular vision observation system, which mainly consists of two cameras, has been a powerful technical support in acquiring 3D information of ocean wave. Compared with the measurement of manual, radar (Harry et al., 2018) and satellite remote, the binocular vision method is not only hardly affected by weather condition, but also can acquire the continuous image data. In addition, two cameras with high resolution can obtain high precision measurement results. This study aims at obtaining the wave height of the swash zone in storm surge process.
Large-Scale Test Of Extreme Hydrodynamic Conditions Over Coastal Salt Marshes
Authors: ANTONINI ALESSANDRO , BRETELER MARK KLEIN , WILLEMSEN PIM , DERMENTZOGLOU DIMITRIS , MULLER JOS , MASON VICTORIA , BOUMA TJEERD , VOUZIOURIS AKIS , BURING PAUL , BORSJE BAS
Published: May 2024

Hard coastal structures such as dikes covered with asphalt or placed block revetments have been widely used in the past for coastal protection in densely populated deltas around the world. Nonetheless, in recent years the effectiveness of hard structures has been questioned in light of the inevitable effects of climate change and their static nature. Decades of research on how salt marshes can play a role within a comprehensive coastal protection scheme suggest that these low environmental impact structures (Maza et al., 2015) might have the capability of dissipating wave energy and hence be technically and formally considered within hybrid coastal erosion and flood protection systems (Borsje et al., 2011). However, only very few studies investigated wave attenuation by real salt marsh vegetation in large-scale laboratories (Ghodoosipour et al., 2022; Maza et al., 2015; Möller et al., 2014) and none of them addressed extreme hydrodynamic design conditions in terms of wave energy and water levels. As a result of this knowledge gap, salt marshes in The Netherlands and all around the world have never been formally considered within the coastal flood protection systems and the underlying risk assessment. With this contribution our aim is to provide an overview of the first worldwide large-scale test focused on the interaction between a salt marsh (i.e. vegetation and shallow foreshore) and extreme hydrodynamic conditions, the adopted measurement techniques and the preliminary results in terms of wave damping, erosion and removed biomass.
Experimental And Numerical Inter-Comparison On Green And Gray Mitigation Alternatives In Flooding Reduction In Coastal Region
Authors: DANG HAI VAN , SHIN SUNGWON , LEE EUNJU , PARK HYOUNGSU
Published: May 2024

Coastal communities in low-lying regions are increasingly vulnerable to severe flooding triggered by high surges and large waves. The sea level rise resulting from climate change induces shorelines to encroach onto coastal land, further exacerbating the flooding damage in coastal areas. Thus, it is necessary to implement coastal structures to mitigate the influence of extreme flooding events on coastal communities. Seawalls, submerged breakwaters, and mangrove forests have been widely constructed worldwide to attenuate wave overflows and their impact on near-coast regions. However, studies on the comprehensive inter-comparison of the protective performance of each measure against flooding events to provide guidelines in coastal design and planning have yet to be limited. Therefore, experimental and numerical models were conducted to investigate the efficiency of natural (mangrove forests) and man-made (seawall and submerged breakwater) coastal structures in reducing the forces, pressures, and hydrodynamics generated by overflows in constructed environments.
Quantifying Wave-Induced Hydrodynamics Near A Saltmarsh Cliff: An Experimental Piv Study
Authors: MULLER J.R.M. , DERMENTZOGLOU D. , LAKERVELD S. H. , BORSJE B. W. , VAN DER WERF J.J. , HULSCHER S.J.M.H. , HOFLAND B. , ANTONINI A.
Published: May 2024

Nature-based flood defences receive increasing interest as a viable option for improving flood safety worldwide. A contemporary case is using the ability of saltmarshes to attenuate waves during storm conditions for strengthening coastal flood defences. To ensure a long-term reinforcement of flood protection, it is important to understand the erosion mechanisms of saltmarshes during storms. One of the critical locations for erosion is at the transition between the saltmarsh and the bare mudflat, often characterized by a vertical step or cliff. These cliffs vary between 0.2 to 2.0 m in height, depending on soil characteristics and local hydrodynamics. However, wave-induced hydrodynamics that controls the (mass) erosion at the saltmarsh cliff are not fully understood. Also the role of saltmarsh vegetation on these near-cliff hydrodynamics are not clearly quantified. In this research, we present high-resolution measurements of wave-induced hydrodynamics at a saltmarsh cliff performed in a scaled wave flume experiment.
Exploring Wave-Vegetation Interaction At Blade Scale: A Comprehensive Analysis Of A Flexible Cylinder Through Experimental Data And A Direct Numerical Simulation
Authors: RAHI JOE EL , REIS RUI ALMEIDA , MARTÍNEZ-ESTÉVEZ IVÁN , TAGLIAFIERRO BONAVENTURA , DOMÍNGUEZ JOSÉ M. , CRESPO ALEJANDRO J.C. , STRATIGAKI VASILIKI , SUZUKI TOMOHIRO , TROCH PETER
Published: May 2024

Aquatic vegetation in the littoral zone, particularly seagrass, is gaining increasing recognition for its net positive impact on the hosting environment. This recognition is rooted in its capacity to absorb wave energy, regulate water flow, and manage nutrient levels, sedimentation and accretion. Thus, there is a growing interest in integrating seagrass as a key component of a comprehensive climate-conscious strategy (Ondiviela et al., 2014). An effective approach to quantify the positive potential of seagrasses in altering coastal wave dynamics is by using numerical models. These numerical models operate at various spatio- temporal scales, ranging from large domains and multiple years to just a few regular waves in high resolution CFD numerical simulations. Zeller et al. (2014) classified these models, operating at different scales into three categories, each addressing the wave-vegetation interaction at a distinct scale: (1) blade scale, (2) meadow scale, and (3) ecosystem scale. The aim of the present study is to investigate the interaction between waves and vegetation at the blade scale. The primary objectives are two: first, to introduce a direct numerical technique that involves a two-way coupling between a fluid solver and a structural solver, and second, to present novel experimental data for a single flexible cylinder (Reis, 2022) serving as validation for the present (and future) numerical model(s).
Enhancing Coastal Flooding Preparedness To Climate Change: An Experimental Analysis Of Urban-Integrated Non-Conventional Adaptation Solutions
Authors: LARA JAVIER L. , DE EULATE MARIA F.ALVAREZ , TOMÁS ANTONIO , FERNANDEZ ALBERTO , LUCIO DAVID
Published: May 2024

Coastal areas are particularly vulnerable to climate change due to their exposure to mean sea-level rise and an intensification in the frequency and intensity of extreme events. Among the most vulnerable areas in Europe are the coastal urban areas of the Macaronesia Islands territories, since they are characterized with urban settlements in low land areas, being highly exposed to flooding. Within the scope of sustainable development and at the same time with the aim of increasing resilience in these areas, the development of a new methodological framework for implementing risk reduction and adaptation measures in coastal flood-prone areas is being applied with the framework of the LIFE-Garachico project (Tenerife, Spain). One of proposed adaptation options is the implementation of concrete blocks in the form of a bench to be disposed along the municipality seafront with the aim of reducing the impact of water sheets into building, generated by wave overtopping. This study presents the results obtained by means of a hybrid numerical and experimental technique to define the hydraulic performance of different bench configuration. Results are included in a global methodology to define the optimum time to implement this solution due to the consideration of different climate change scenarios.
Arctic Coastline Erosion: Novel Experimental Avenues Help Understand Its Response To A Changing Climate
Authors: GOSEBERG NILS , MICHALKE NILS , GIMSA JUSTUS , SCHÜRENKAMP DAVID , Kruse ROLAND , JÄNICKE RALF , LANTUIT HUGUES
Published: May 2024

Permafrost coastlines represent a large portion of the world’s coastal area and these areas have become increasingly vulnerable owing to the changing climate and its strong dynamics observed over the past decades (Irrgang et al., 2022). The predominant mechanism of coastal erosion in these areas has been identified through several observational studies as thermomechanical erosion—a joint removal of sediment through the melting of interstitial ice (thermal energy) and abrasion from incoming waves (mechanical energy). Longer summer seasons where -due to a much lower ice cover- waves can more freely propagate towards Arctic coastlines have exacerbated coastal erosion (Overeem et al., 2011) and which is projected to increase inline with Arctic warming (Nielsen et al., 2022). Erosional effects have long been a subject of the coastal engineering community, however, the combined effect of wave attack on shorelines, in combination with thermomechanical processes has largely been overlooked. The implications of Arctic coastline erosion are plenty: local communities face relocations of whole settlements, loss of valuable property or cultural heritage while acceleration in thaw causes a much higher influx of environmental contaminants and nutrients into the Arctic Ocean. It is hence crucial to engage this pressing challenge with long established and novel methods originating from the coastal engineering community. This work provides an overview over novel avenues that are useful for a better understanding of the processes and interactions of ocean waves and Arctic coastlines. It also presents some of the recent erosional observations from a cold room flume and micro CT measurements.
Measuring ageism: Psychometric analysis of the Portuguese short form of the Fraboni Scale (FSA-SF)
Authors: Neto Joana , Neto Félix
Published: May 2024

This article reports the development of a Portuguese shortened form of the Fraboni Scale of Ageism FSA (FSA-SF). The original FSA with 29 items measures the affective aspect of attitudes toward elderly to complement the cognitive component evaluated by other tools. Two studies were implemented to determine the psychometric features of the FSA-SF with 9 items. In the first study, 404 participants answered a questionnaire in Portuguese to evaluate the dimensionality of the FSA-SF via confirmatory factor analysis. In addition, the second-order factor, the reliability, and the convergent validity of the FSA-SF was assessed. Results showed 3 factors (Avoidance, Stereotypes, and Discrimination) with a second order factor (Ageism). The reliability and convergent validity of the FSA-SF were adequate. In the second study, 246 participants also answered a questionnaire in Portuguese to evaluate the replicability of the 3-factor structure and the second-order factor. In addition, the reliability, convergent, and incremental validity of the FSA-SF were examined. Good construct validity for the first and second order models was replicated via confirmatory factor analyses. Findings showed that the Portuguese FSA-SF had satisfactory reliability, convergent, and incremental validity. Overall, this article determines that the Portuguese shortened FSA-SF is an adequate tool to assess ageism.
تحليل العلاقة بين ولاء العميل وربحية محطات تداول الحاويات بميناء بنغازى البحرى
Authors: بوزيد الكوافى وسام حسن
Published: May 2024

المستخلص تهدف الدراسة التعرف على العلاقة بين زيادة مستوى ولاء العميل على زيادة الربحية بمحطة تداول الحاويات بميناء بنغازى البحرى، وقام الباحث بصياغة فرض رئيس ومجموعة من التساؤلات لتغطية كافة جوانب هذه البحث. وقد تم الاعتماد على المنهج الوصفي التحليلي لهذا الغرض، واستخدم الباحث قوائم الاستقصاء كأداة رئيسية لجمع البيانات حيث تمثل مجتمع الدراسة في عينة المدراء ( الخطوط الملاحية ) باستخدام اسلوب المسح الشامل لعدد (120) مفردة وقد تم استعادة (93) استمارة بنسبة (77.5 %) من الاستمارات الموزعة، وكذلك عينة من مجتمع العاملين بمحطات تداول الحاويات موضوع الدراسة والبالغ عددهم (715) عامل وقد تم اختيار عينة عشوائية بسيطة بعدد (179) مفردة من العاملين وذلك لأن مجتمع البحث يعبر عنه بوحدة واحدة بغض النظر عن ومستوياتهم الوظيفية ولقد تم استعادة (120) استمارة بنسبة (80%) من الاستمارات الموزعة. ولتحليل بيانات الدراسة ومعالجتها واختبار فروض الدراسة تم استخدام برامجSPSS vr 22) -) كرزمة إحصائية لإدخال ومعالجة وتحليل البيانات. وكذلك برنامج (AMOS SATA LISERAL vr 22) وخلصت الدراسة إلى مجموعة من النتائج اهمها: انه كلما ارتفعت درجة ولاء المستهلك او الخط الملاحي لمحطات تداول الحاويات له تأثير على ربحية المحطات في محطات تداول الحاويات بمحطة تداول الحاويات بميناء بنغازى البحرى وجهة نظر العملاء والعاملين. وخلصت الدراسة: الى العديد من التوصيات أهمها ضرورة الارتقاء بمستوى جودة الخدمة المقدمة وادخال العديد من التعديلات في جوهر خدمة تداول الحاويات لأنها عامل هام في رفع مستوى ولاء الخط الملاحي للمحطة وكذلك الاهتمام بمستوى تدريب العاملين في تلك المحطات على اسلوب تقديم الخدمة وبناء علاقات جيدة وطويلة الاجل مع العملاء وتنبى الإدارة العليا لمحطات تداول الحاويات مفهوم ولاء المستهلك لديها والعمل الدائم على رفع درجات ولاء المستهلك لما له اثر مباشر على الربحية.
Implications of the Offshore Oil & Gas Working Environment on Mental Health and Performance of Workers
Authors: Gadalla Hossam Eldin , Helal Hesham , Nofal Ahmed Saad
Published: May 2024

Abstract This study aimed to investigate the potential effect of the site location on the relationship between the Oil and Gas working environment’s psychosocial hazards, mental health disorders and workers’ Performance. Quantitative methods and deductive approaches have been used. The study’s population was Egyptian Oil & Gas workers, and the study sample included 409 participants. The collected data were statistically analyzed using descriptive analysis, correlation analysis, independent samples t-test, and Structural Equation Modelling (SEM). The results indicated a high levels of psychosocial hazards in the Oil & Gas working environment, where isolation, remoteness and adverse living conditions significantly depicted the highest levels. The presence of mental health disorders was confirmed by screening Depression, Stress and Anxiety among the study sample, where most responses indicated difficulties in their abilities to overcome. Further, the results showed an average level of performance with a noticeably low levels in contextual performance aspects. The study concluded that performance in the offshore Oil & Gas industry is not entirely a functional pattern but can also be influenced by the working environment, where the moderating effect of the site location of the Oil & Gas working environment on workers’ mental health disorders could eventually compromise their performance levels, ultimately harming the interest and sustainability of this vital sector.
Examining the influence of global terminal operators on the performance of container terminals via privatization strategies in the maritime sector
Authors: shendy mohamed
Published: May 2024

Abstract This research navigates the evolving of global trade through an exploration of the strategic evolution of container terminals, with a specific focus on the integral role played by Global Terminal Operators (GTOs) amid prevailing privatization trends. Recognizing container terminals as critical nodes within the maritime supply chain, the study employs a comprehensive approach anchored in SWOT analysis to uncover the nuanced consequences of privatization, accentuating the collaborative influence exerted by GTOs. The research is dedicated to unraveling the intricate dynamics that shape container terminal performance, with a particular emphasis on operational efficiency, financial sustainability, administrative processes, and infrastructure development. In the era of heightened global economic interconnectivity, the study underscores the paramount importance of understanding the implications of privatization strategies. By providing nuanced insights into the strategic role of GTOs, this research transcends the boundaries of individual terminals, offering valuable perspectives for policymakers, industry stakeholders, and academics grappling with the intricacies of maritime infrastructure development in this transformative era.
The Association of Patient-Provider Language Concordance with Healthcare Comprehension Among Mexican-origin Latino/as in Oregon
Authors: Para Grace , Boniface Emily , Diaz-Anaya Sara , Ledezma-Meza Nancy , Jacobson Laura , Darney Blair
Published: May 2024

Objective: To understand the local Mexican-origin Latino community’s preference for bilingual health care providers and understand the relationship between language concordant care and comprehension of a healthcare visit. Background: Language barriers in healthcare negatively impact quality of care. Language concordant care (where a health care provider speaks the patient’s language) has been shown to result in better patient comprehension than using interpreters/translators. Study Design: This is a cross sectional study in collaboration with the General Consulate of Mexico. We developed a 20-item survey that includes questions about socio-demographics, an acculturation scale, and questions regarding language concordant care experience and preferences. Participants were aged 18 or older who had a healthcare visit within the past 12 months. We used descriptive and multivariable statistics to describe our sample and test the association of language concordant care and comprehension of the healthcare visit. Results We recruited 505 participants who all completed the survey in Spanish. Overall, 93.5% reported preference for a language concordant provider and 32.9% reported receipt of such care. Of those who reported a concordant provider visit, 87% reported a regular source of care compared to 50% among those with a discordant provider (p<0.001). In multivariable analyses, patients with a concordant provider had higher odds of understanding everything their provider said (aOR = 10.53 (95% CI: 6.60-16.81). Conclusion There is a gap between the preference for language concordant providers and the receipt of this type of health care for Oregon Latinos. Increasing access to language concordant care can contribute to improving health care quality, equity, and outcomes for Latinos in Oregon.
SEPSIS CAUSED BY CHROMOBACTERIUM VIOLACEUM AND SUGGESTIONS FOR DIAGNOSIS, TREATMENT: A CASE REPORT
Authors: Bui Van Nam , Nguyen Thanh Le , Dang Thi Thuy , Nguyen Hai Van , Bui Vu Huy
Published: May 2024

The article presented a case of bacteremia caused by Chromobacterium violaceum in a 9-year-old girl.This was a rare disease in humans, so the diagnosis and treatment were delayed. The entire prossess of disease and antibiotic therapy have been described in detail. Although life was saved, the consequences for the patient can be long-lasting
Analysis of the Utilization of Posbindu for Non-Communicable Diseases among the Elderly in the Region Kerja Public Health Center Kuta Krueng District of Pidie Jaya
Authors: Sibrina  , Aramico Basri , Azwar Eddy
Published: May 2024

The Integrated Development Post for Non-Communicable Diseases (Posbindu PTM) is one of the facilities that involves community participation in carrying out early detection and monitoring of NCD risk factors. Quantitative research with a cross-sectional approach. The population of all elderly people in the Kuta Krueng Health Center working area is 581 people. The sample was 85 people. The research results showed that 76.5% did not utilize Posbindu PTM. The research conclusion is that there is a relationship between family support (p-value 0.034), physical condition (p-value 0.016), perceived benefits (p-value 0.000), knowledge (p-value 0.004) and the use of Posbindu PTM. Efforts are needed to increase family support, improve physical condition, perception of benefits, and increase knowledge of elderly people about non-communicable diseases and efforts to prevent them
Business Transformation and the Performance of Manufacturing Frms in Nigeria
Authors: Samson Audu
Published: May 2024

The business atmosphere is increasingly becoming competitive due to the reality of global dynamics. Thus, firms especially, the manufacturing sub-sector need to adopt transformation strategies to enable them compete favorably. This study titled Business transformation and Performance of the Manufacturing Firms in Nigeria is written to examine the effect of business transformation on performance of manufacturing sub-sector in North-Central Nigeria. The population of the study was 1404 spread across the selected manufacturing firms in Nigeria. However, due to the fact that the population is large the researcher utilized the Godden sample size statistical technique to reach 302 respondents, however, only 284 respondents completed and returned their questionnaire which shows a retrieval rate of 94%. More so, the study applied research survey design, and the statistical tools applied comprised descriptive and parametric statistics. More so, the hypothesis was tested using simple linear regression analysis. The findings revealed that there is a significant positive relationship between Technological Resource application and First Pass Yield (r =.939, p-value <0.05. In view of the finding, the study concluded that there is a significant positive relationship between Business transformation and Performance of manufacturing firms in Nigeria. Anchored on the finding the study recommends that a Business Transformation techniques should be improved and periodic review be carried out in order to sustain and improve  performance.
Harnessing Artificial Intelligence for Youth Engagement in Agriculture: Lessons from Global Practices and Prospects for Nigeria
Authors: Olagunju Oluwatoyin Olatunde
Published: May 2024

The demand for sustainable farming techniques is growing as the world's population rises. In light of this requirement, enlisting young people in agriculture becomes an essential tactic for guaranteeing food security, economic growth, and rural rejuvenation. Using artificial intelligence (AI) offers a viable way to empower and draw young people to the agriculture industry. This study explores the possibilities for Nigeria while providing a summary of international approaches to using AI to encourage youth involvement in agriculture. By utilizing AI technologies like machine learning, remote sensing, and data analytics, youth can access valuable insights, optimize resource utilization, and mitigate risks associated with agricultural production. In conclusion, this paper emphasizes how AI might inspire young people to pursue careers in agriculture and emphasizes the necessity of developing methods specifically designed to maximize AI's potential in Nigeria. Nigeria can set the stage for a sustainable and inclusive agricultural future by encouraging stakeholder engagement, investing in digital infrastructure, and advancing creative policies. This would enable the country's young to spearhead agricultural transformation and economic success.
Political Stability, Corruption, and Economic Development: Evidence from WAMZ Countries
Authors: Hayewa Suleya’u , Olateju Adijat Olubukola
Published: May 2024

This paper examines the political stability, corruption, and economic progress of the nations that make up the West African Monetary Zone (WAMZ) between 2000 and 2020. To prevent misspecification bias and therefore skewed statistical results, the common features of the panel data were examined first. First of all, the CD test did not find any evidence of cross-sectional dependency across the nations, validating the use of the conventional panel unit root, which does not account for cross-sectional dependence. According to Levin et al. (2002)'s panel unit root test, the variables are integrated of order zero, or I (0).Using the panel VAR framework as a basis, the paper investigates. Emotional intelligence data demonstrated that while corruption impedes regional economic growth, political stability and the rule of law foster it. According to the findings of variance decomposition, the factors under investigation either support or impede the WAMZ countries' economic development. Based on the results the paper recommends that, transparency and accountability at all level of government affairs as well as respecting the constitution in these nations should be preserved in order to overcome all social and political injustice among the countries under study
Corruption in Formal Adult Education in Nigeria: Implications for Sustainable National Development
Authors: O. Olateju Adijat
Published: May 2024

This position paper took a cursory view of corruption, examined adult education, assessed corruption in formal adult education and highlighted the implications for sustainable national development in Nigeria. The paper concluded that concerted efforts must be put in place in order to curb the menace of corruption in adult education. Adult education is the poorest sector in education in terms of allocation of financial resources. Government allocates meagre financial resources annually to adult education organizations, yet corrupt financial practices are perpetrated by the operators of adult education institutions in Nigeria. There is equally the challenge of cheating in examination and examination malpractice. These have stifled the developmental needs of the country to be provided by adult education. It was suggested that the EFCC and ICPC should beam their searchlight on adult education sector of education with a view to recovering stolen funds arresting and prosecuting offenders of embezzlement and misappropriation of education funds; adult learners found guilty of corrupt practices should have their admission revoked; adult educators found guilty of the monetary extortion should be relieved of their jobs; and government should make it as a point of duty to allocate 3% of her education budget to adult education annually.
Administrators Roles in Enhancing Performance of Facilitators in Open and Distance Learning Study Centers in Rivers State
Authors: U Osuji, Catherine , Omenogo Anyanwu, Dorathy
Published: May 2024

The study aimed to understand the role of administrators in enhancing the performance of facilitators in open and distance learning centers in Rivers State. The study involved 73 facilitators, 41 males and 32 females, from study centers in Port Harcourt and Iriebe. A structured questionnaire was used, validated by experts in Measurement and Evaluation and the Department of Educational Management at Rivers State University. Key findings revealed that facilitators lack proficiency in using information and communication tools, irregular allowances undermine motivation, and inadequate facilities do not align with the increasing student population. The study recommends effective collaboration between administrators and facilitators to improve facilitator performance.
The Effect of Otaria Exercise for Perineal Wounds in Postpartum Women in the Karang Intan 2 Health Center Banjar South Kalimantan
Authors: Kirana Rita , Tut Barkinah  , Januarsih  , Agus Rachmadi  , Suhrawardi  , Isrowiyatun Daiyah
Published: May 2024

One of the causes of maternal mortality is infection during the puerperium at 11%. Infections during the puerperium can come from birth canal openings which are a good medium for germs to develop. This researh used a Quasi-experiment approach. Respondents were divided into 2 groups, control group who did not perform Otaria exercises and treatment group who performed Otaria exercises. The p value <0.05, meaning that there is an effect of Otaria exercises on Perineal Wound Healing in postpartum women in the Karang Intan 2 Health Center area. Otaria exercises can improve blood circulation to the perineum, the state of clean oxygen-rich blood is expected to help in the healing process of perineal suture wounds.