bluuebunny/crossref_metadata_2025_split huggingface dataset:
Study on Natural Gas/Diesel Dual-fuel Engine Energy Ratio: Effect of Natural Gas Injection Parameters
Authors: Felayati Frengki Mohamad , Dwisetiono  , Prasutiyon Hadi , Ariani Betty 
Published: September 2022

Abstract
Natural gas has been a promising demand for several years in Indonesia as a fuel for a diesel engine by converted into a natural gas/diesel dual-fuel engine. However, determining the energy ratio of the diesel and natural gas fuel is important due to the engine performance and emissions which affect the engine safety operation. This study presents the method to determine the natural gas and diesel fuel energy ratio on intake port natural gas injection mode through experiment. A direct injection diesel engine is converted to a natural gas/diesel dual-fuel engine by injecting natural gas into the intake port. The diesel injection parameters are unmodified for the experiment; besides the natural gas injection variations are studied to determine the energy ratio. Moreover, the engine is tested for low to high load conditions. However, natural gas injection duration, pressure, and injection timing variation affect the fuel energy ratio and indicated thermal efficiency (ITE). At low load, the optimum fuel energy ratio and ITE are achieved at a long injection duration (10 ms) and with advanced injection timing. Moreover, at high load, the optimum fuel energy ratio and ITE is achieved at high natural gas injection duration (12 ms), high injection pressure (3 bar), and advancing the injection timing.
The Application of Emergency Safety Device for The Improvement of Marine Operation of a Gas-Powered Ship
Authors: Santoso Agoes , Zaman Muhammad Badrus , Saihilmi Muhammad Irsyad 
Published: September 2022

Abstract
A new Emergency Safety Device (ESD) based on a PLC module that can start and stop a modified dual-fuel diesel engine in automatically has been created. When fitted to a modified dual fuel engine, the laboratory scaled PLC module has been tested and found to perform well in any programmable emergency circumstance. Because the modified engine’s compression ratio has been increased, the risk of hazards has increased as well. When any pre-defined dangers are recognized, the ESD logical code can automatically control the functioning of the fuel system to provide uninterrupted fuel delivery, but it can also halt the fuel supply, including gas and diesel fuel. Over-pressure, over-temperature, flow rate, rpm, and gas leakages are all potential hazards. To identify those potential hazards, then scoring method is used to model and simulate them quantitatively. The simulation data is used as input data for Arduino Source Code, which is used to process logical acts in the marine engine operation. Finally, the safety level is assessed using a safety standard approach such as the SHEL Method. The results of the works show that ESD eligible to control the operation of gas fuel system and it is considerable to be applied for gas-powered ship.
Analysis of a Lower Deck Rigging Configuration and Reusable Padeye Design based on Finite Element Model for Improving Stacking Operation Efficiency
Authors: Giri Kautsar Robbi Yahya , Prastianto Rudi Walujo , Rifqy Mohammad Jazil , Farhana Roficho Filzah 
Published: September 2022

Abstract
In the topside fabrication process, the decks will be fabricated first simultaneously and then they will be arranged sequentially to form the topside through a stacking operation. The integrity of the deck structure must be maintained during and after the stacking process. The integrity of the deck structure and rigging system is strongly influenced by the design of the rigging system. Meanwhile, the design of the rigging system is limited to the equipment available to the company. So, it is necessary to analyze a proper rigging configuration with the existing limitations. In this case study, the rigging design and stacking analysis of the lower deck structure were carried out. From the analysis results, the 4 crane rigging configuration is used, with the highest crane utilization occurring on the crane is 89%. In the rigging system, the smallest safety factor on the sling is 1.17, and the shackle is 1.12, while on the deck structure the maximum UC is 0.32 and the maximum deflection that occurs is 2.17 cm. The reusable padeye UC is 0.53 in the numerical method analysis with a maximum von misses stress is 191 MPa which was concentrated at the lower end of the stiffener plate.
Impact Assessment of Breaking Waves Criteria Subjected to Wave Energy Converter
Authors: Prastianto Rudi Walujo , Assidiq Fuad Mahfud , Mukhtasor  
Published: September 2022

Abstract
Breaking wave effect on Wave Energy Converter (WEC) represents an important issue of site selection analysis especially fringing reefs area. To learn a more acceptable sense of the influence of this effect, an introspection on the estimate of initial breaker points is proposed in the present study. The paper describes an investigation of the impact assessment of wave-breaking criteria subjected to WEC recently desired as a benchmark by the previous three wave-breaking methods. The numerical simulation is carried out by the Computational Fluid Dynamics (CFD) solver. The solver is based on the Finite Volume Method (FVM) to create the discretization of the governing equations. Large Eddy Simulation (LES) is solved in a global approach together with Volume of Fluid (VoF) for capturing free surface. Reported justifications are compared with the experimental data to validate the accuracy of the numerical approach and then applied to generate wave-breaker point location on a fringing reef in Numerical Wave Tank-based (NWT) of 16 scenarios. The results are discussed with respect to relative wave-breaker locations, relative wave-breaker height range, and wave breaking probability under various wave steepness, water depth, and slope fringing reef. It is given regarding the discrepancy between different methods and recommendations for important guidances are outlined.
Performance analysis of dual-stage vertical axis hydrokinetic turbine (VAHT) with azimuth variation at open canal hydrokinetic power plant
Authors: Hantoro R , Septyaningrum E , Nugroho G , Alam M F A , Fawwaz M D , Alfarisyi F D , Alfarizi M I , Prasetyo R A 
Published: September 2022

Abstract
For several decades, the use of hydropower generation using hydrokinetic turbines has grown rapidly, aiming to get energy alternatives and reduce the dependency on fossil energy. Despite it has low efficiency, the vertical axis hydrokinetic turbine (VAHT) has been used to utilize hydro energy and has a promising result. A previous study had stated that the utilization of cascaded blade enhances the performance of VAHT. However, this technology produces fluctuating torque and power during its rotation. Hence the dual-stage VAHT is proposed to overcome this issue to improve VAHT’s efficiency. This research analyzes the dual-stage VAHT’s performances by variating its inter-stage azimuth of 45°, 60°, 75°, and 90°. For each stage, there is six blades that attach at three arms. The computational fluid dynamics (CFD) simulation is employed as its capability to provide in-depth information regarding flow phenomenon, force, and torque. This simulation has proven that the dual-stage configuration has an impact on reducing torque fluctuation of VAHT and show that different of inter-stage azimuth angle brings to different torque fluctuation pattern. The average torque value produced by the new turbine with variations in shift between stages of 45°, 60°, 75° and 90° is 10,119.21 Nm, 10,656.13 Nm, 10,490.31 Nm, and 10,457.3 Nm, respectively.
Self propulsion Performance Analysis of Japanese Bulk Carrier with PBCF Based CFD Method
Authors: Nugraha Oloan Achdri Fauzi , Made Ariana I , Baidowi Ahmad 
Published: September 2022

Abstract
An energy-saving device (ESD) is used to obtain energy lost and convert additional energy to a propulsive coefficient. This research uses PBCF as an energy-saving device that is attached to an MP687 propeller and a Japanese bulk carrier a hull. Method for solving this research using the open water test and self propulsion method based on computational fluid dynamic (CFD). Added propulsive coefficient obtained from PBCF conventional can reach up to +1.52 %. PBCF with duct make smaller added for propulsive coefficient caused by duct splitting fluid flow from the propeller. PBCF with duct can increase propulsive coefficient up to +0.48 %. PBCF can eliminate a strong hub vortex at propeller MP687 and its ba e good choice for the increased propulsive coefficient of the ship
Risk Evaluation Concept of Engine Room Module Installation on Modular Construction Shipbuilding
Authors: Baroroh Intan , Made Ariana I , Dinariyana AAB 
Published: September 2022

Abstract
The implementation of the construction of modular construction ships is able to accelerate ship production by up to 50%. However, in practice, delays in the production process can still be found in the engine room module of the modular ship building process. Production delays occur due to inappropriate block dimension accuracy, damaged machine conditions, loading blocks that are not on schedule, many revisions to drawings, delays in equipment and basic ship materials. The production process includes a series of activities carried out including: Hull construction, Painting & Protection, Outfitting Manufacture, Machinery Outfitting, Accommodation Outfitting, Electric, Electrical Outfitting. This research aims to evaluate the performance of engine room module installations in shipyards that apply a modular construction system. At an early stage, the research was conducted by identifying factors and constraints that affect the performance of the engine room installation in shipbuilding which has the potential to cause delays. The conceptual and technical approach are carried out by analyzing the causal relationship of the identification of factors at the production stage. The results of this research is expected to anticipate earlier delays in the engine room module installation with the concept of evaluation using Bayesian Network integration and System Dynamics.
Lysozyme-assisted ultrasonic exfoliation of graphitic carbon nitride into highly stable nanosheets with enhanced bactericidal capacity
Authors: Chen Liang-Liang , Shi Wen-Pu , Zhang Tuo-Di , Zhou Ren-Bin , Jin Xiao-Qian , Zhou Ya-Qing , Lin Wen-Juan , Guo Wei-Hong , Yin Da-Chuan 
Published: September 2022

Abstract
Graphitic carbon nitride (g-C3N4) is a visible light-responsive photocatalytic material with important application prospects in many fields. However, the interaction between g-C3N4 monolayers makes it easy to aggregate and precipitate in aqueous solutions, and it is necessary to prepare stable g-C3N4 aqueous dispersions for their applications. Here we propose a facile, green, and low-cost method for the preparation of stable g-C3N4 dispersions by ultrasonicating g-C3N4 in lysozyme (LYZ) solution. The LYZ was adsorbed on the surface of g-C3N4 through non-covalent interactions such as electrostatic interaction, hydrogen bonding and π-cation interaction to prevent the aggregation of g-C3N4 nanolayers. The LYZ/g-C3N4 could quickly re-form a uniform aqueous dispersion solution after freeze-drying, and exhibit good stability. Further, the results of photocatalytic sterilization showed that the assisted dispersion of LYZ enhanced the bactericidal activity of g-C3N4 and exhibited promising application prospects in the field of biomedicine and water disinfection.
An efficient updation approach for enumerating maximal (Δ,γ)-cliques of a temporal network
Authors: Banerjee Suman , Pal Bithika 
Published: September 2022

AbstractGiven a temporal network $\mathcal{G}(\mathcal{V}, \mathcal{E}, \mathcal{T})$, $(\mathcal{X},[t_a,t_b])$ (where $\mathcal{X} \subseteq \mathcal{V}(\mathcal{G})$ and $[t_a,t_b] \subseteq \mathcal{T}$) is said to be a $(\Delta, \gamma)$-clique of $\mathcal{G}$, if for every pair of vertices in $\mathcal{X}$, there must exist at least $\gamma$ links in each $\Delta$ duration within the time interval $[t_a,t_b]$. Enumerating such maximal cliques is an important problem in temporal network analysis, as it reveals contact pattern among the nodes of $\mathcal{G}$. In this article, we study the maximal $(\Delta, \gamma)$-clique enumeration problem in online setting; that is, the entire link set of the network is not known in advance, and the links are coming as a batch in an iterative fashion. Suppose, the link set till time stamp $T_{1}$ (i.e. $\mathcal{E}^{T_{1}}$), and its corresponding $(\Delta, \gamma)$-clique set are known. In the next batch (till time $T_{2}$), a new set of links (denoted as $\mathcal{E}^{(T_1,T_2]}$) is arrived. Now, the goal is to update the existing $(\Delta, \gamma)$-cliques to obtain the maximal $(\Delta, \gamma)$-cliques till time stamp $T_{2}$. We formally call this problem as the Maximal $(\Delta, \gamma)$-Clique Updation Problem for enumerating maximal $(\Delta, \gamma)$-cliques. For this, we propose an efficient updation approach that can be used to enumerate maximal $(\Delta, \gamma)$-cliques of a temporal network in online setting. We show that the proposed methodology is correct, and it has been analysed for its time and space requirement. An extensive set of experiments have been carried out with four benchmark temporal network datasets. The obtained results show that the proposed methodology is efficient both in terms of time and space to enumerate maximal $(\Delta, \gamma)$-cliques in online setting. Particularly, compared to it’s off-line counterpart, the improvement caused by our proposed approach is in the order of hours and GB for computational time and space, respectively, in large dataset.
Catastrophic presentation of peripartum cardiomyopathy: a case report of a challenging diagnosis
Authors: Silva Mariana Ribeiro , Silva Gualter Santos , Caeiro Daniel , Fontes-Carvalho Ricardo 
Published: September 2022

Abstract

Background
Peripartum cardiomyopathy (PPCM) usually affects women in the last month of pregnancy or in the first months following delivery and typically presents with signs and symptoms of heart failure (HF), although catastrophic presentations may be the initial manifestation.

Case summary
A 36-year-old woman reported intense fatigue that began after delivery. Three months following delivery, she suffered a cardiac arrest at home, in shockable rhythm, with a total estimated time of 70 min before return of spontaneous circulation. Electrocardiogram presented diffuse ST-segment depression and transthoracic echocardiography showed severe left-ventricle (LV) dysfunction with global hypokinesis. In the catheterization laboratory, she underwent a triple rule out (no aortic, coronary, or pulmonary vascular disease); ventriculography was not suggestive of Takotsubo syndrome. She was transferred to the cardiac intensive care unit, under invasive mechanical ventilation and vasopressor support. A presumptive diagnosis of PPCM was made and bromocriptine and heparin were started. In three days, she was weaned from haemodynamic support and extubated, with good neurologic outcome. Cardiac magnetic resonance showed no signs of inflammation or fibrosis. Cardiomyopathy genetic test was negative. PPCM diagnosis was assumed, HF therapy was introduced and a cardioverter-defibrillator was implanted. At 2.5 months follow up, she presented HF NYHA Class II and recovered LV function.

Discussion
We present a case of a woman, three months after delivery, who developed a catastrophic manifestation of PPCM. This case raises awareness about atypical presentations of PPCM, whose diagnosis should be considered in the appropriate clinical context, but ultimately, remains a diagnosis of exclusion.
The Effects of Mindfulness Interventions on Older Adults’ Cognition: A Meta-Analysis
Authors: Mirabito Grazia , Verhaeghen Paul 
Published: September 2022

AbstractObjectivesTo examine the effect of mindfulness interventions on cognitive tasks in healthy older adults and older adults with diagnoses of mild cognitive impairment (MCI) or dementia.MethodsThree-level meta-analysis and systematic review of 30 published randomized-controlled trials.ResultsMindfulness interventions provided a small, yet significant positive effect on cognition compared to a control group (average weighted Hedges’ g = 0.36, 95% confidence interval [CI] [0.06–0.65]). Attention (g = 0.22, 95% CI = [0.09, 0.35]), long-term memory (g = 0.32, 95% CI = [0.08, 0.56]), and visuospatial processing (g = 0.22, 95% CI = [0.10, 0.34]) all showed significantly meaningful changes regardless of cognitive status of the participants. There was no evidence for publication bias. Healthy older adults showed higher effect sizes than those with MCI (g = 0.27, 95% CI = [0.11, 0.43], vs. (g = −0.09, 95% CI = [−0.35, 0.17], respectively). Otherwise, there were no significant moderating effects of age, marital status, education, region, intervention type, length, number of sessions, adherence, or gender on effect size. Moderator analyses within cognitive domains suggest that focused attention practices might be the best for improving cognition. Lastly, meditation interventions seem to work as effectively as other mind-body interventions, but not as effectively as other interventions to improve cognitive functioning in older adults.DiscussionMindfulness interventions appear to be a useful tool for improving cognitive functioning in older adults.
Osteonecrosis in Inflammatory Bowel Disease: Clinical Features, Risk Factor Analysis, and Outcomes
Authors: Bakhshi Zeinab , Yadav Siddhant , Harmsen W Scott , Edakkanambeth Varayil Jithinraj , Karls Kevin A , Tremaine William J , Loftus Edward V 
Published: September 2022

AbstractBackgroundAvascular necrosis (AVN) is a known adverse event associated with corticosteroid (CS) usage. Inflammatory bowel disease (IBD) is often treated with a CS for induction of remission. We sought to describe clinical features and outcomes of IBD patients with AVN.MethodsIn this retrospective, single-center, case-control study, patients with IBD who had a diagnosis of osteonecrosis, aseptic necrosis, or AVN from 1976 to 2009 were included, and each was matched with up to 2 controls (IBD but no AVN) on age, sex, IBD subtype, geographic area of residence, and date of IBD diagnosis. We abstracted risk factor data from the medical records. Conditional logistic regression was performed accounting for minor differences in age and date of first IBD visit to assess the relationship between putative risk factors and AVN, expressed as odds ratio and 95% confidence interval.ResultsEighty-five patients were diagnosed with IBD-AVN and were matched with 163 controls. The mean age at AVN diagnosis was 47.5 years. AVN was diagnosed a median of 12.2 years after IBD diagnosis, and the control group was followed for a median of 15 years after IBD diagnosis to ensure that they did not have AVN. Ten percent of patients with AVN did not have any CS exposure. History of arthropathy or estrogen use in Crohn’s disease and use of CS, osteoporosis, and history of arthropathy in ulcerative colitis were significantly associated with AVN.ConclusionsMost patients with IBD-AVN had multifocal involvement. Most had received CS, but many patients had other risk factors including arthropathy.
Biotic Interactions and the Future of Fishes on Coral Reefs: The Importance of Trait-Based Approaches
Authors: Hodge Jennifer R , Price Samantha A 
Published: September 2022

AbstractBiotic interactions govern the structure and function of coral reef ecosystems. As environmental conditions change, reef-associated fish populations can persist by tracking their preferred niche or adapting to new conditions. Biotic interactions will affect how these responses proceed and whether they are successful. Yet, our understanding of these effects is currently limited. Ecological and evolutionary theories make explicit predictions about the effects of biotic interactions, but many remain untested. Here, we argue that large-scale functional trait datasets enable us to investigate how biotic interactions have shaped the assembly of contemporary reef fish communities and the evolution of species within them, thus improving our ability to predict future changes. Importantly, the effects of biotic interactions on these processes have occurred simultaneously within dynamic environments. Functional traits provide a means to integrate the effects of both ecological and evolutionary processes, as well as a way to overcome some of the challenges of studying biotic interactions. Moreover, functional trait data can enhance predictive modeling of future reef fish distributions and evolvability. We hope that our vision for an integrative approach, focused on quantifying functionally relevant traits and how they mediate biotic interactions in different environmental contexts, will catalyze new research on the future of reef fishes in a changing environment.
Aortic remodelling and late outcomes following thoracic endovascular repair with a bare-metal stent distal extension among patients with complicated type-B aortic dissection
Authors: Wamala Isaac , Nazari-Shafti Mir Timo Zadegh , Heck Roland , Penkalla Adam , Montagner Matteo , Staffa Steven J , Falk Volkmar , Buz Semih 
Published: September 2022

Abstract

OBJECTIVES
The goal of this study was to describe the factors affecting mid and late aortic remodelling following thoracic endovascular aortic repair with the PETTICOAT (Provisional Extension To Induce Complete Attachment) technique among patients with complicated acute or subacute type B aortic dissection.

METHODS
A retrospective single-centre study that evaluates clinical and morphological outcomes among 65 consecutive patients. The area and diameter of the true and false lumen, overall aortic diameter and false lumen perfusion were evaluated.

RESULTS
Concomitant direct visceral artery stenting was successfully conducted in 32 (49%) patients. There was one (1.5%) postoperative stroke; three (4.6%) patients developed spinal cord ischaemia; two (3%) patients suffered retrograde type A dissection; and two (3%) patients had mesenteric ischaemia, despite successful reperfusion, that required a bowel resection. Median postoperative follow-up was 63.1 (interquartile range, 32.1– 91.8) months. The probability of survival was 96.9% [95% confidence interval (CI) 88.3%–99.2%] at 30 days, 93.9% (95% CI 84.4%–97.6%) at 1 year, 78.0 (95% CI 64.2%–87.0%) at 5 years and 72.8% (95% CI at 57.9%–83.2%) at 10 years postoperatively. There was a statistically significant postoperative increase in true-lumen area, diameter and true-lumen index in all five aortic levels measured. Complete false lumen (FL) thrombosis at the coeliac trunk, renal arteries and aortic bifurcation levels was observed in 47%, 15% and 24% of patients at midterm (6–15 months) and in 29%, 21% and 29% on late (later than 21 months) computed tomography angiograms (CTA). Persistent false lumen (FL) perfusion at the coeliac level on midterm CTA was associated with a larger extent of late aortic growth (P = 0.042) and was, in the majority of cases, caused by iliac re-entries either alone (28.57) or in combination with visceral and lumbar (28.57%) or distal aortic (10.71%) re-entries. A larger abdominal aortic diameter at midterm was associated with an increased probability of distal aortic reinterventions (hazard ratio 7.26, 95% CI 2.41–21.9, P &lt; 0.001).

CONCLUSIONS
Persistent FL perfusion of the distal aorta at midterm following TEVAR with the PETTICOAT technique among patients with acute and subacute type B dissection is caused mainly by iliac, visceral, lumber and distal aorta re-entries. Patients with persistent FL perfusion have an increased risk of aortic aneurysmal growth at late follow-up.