bluuebunny/crossref_metadata_2025_split huggingface dataset:
Effect of Silk Fibroin Content on Physical and Mechanical Properties of Electrospun Poly(lactic acid)/Silk Fibroin Nanofibers for Meniscus Tissue Engineering Scaffold
Authors: Promnil Siripanyo , Ruksakulpiwat Yupaporn , Ruksakulpiwat Chaiwat , Numpaisal Piya-on 
Published: February 2022

AbstractThis study aims to produce composite nanofibers from polylactic acid (PLA) and silk fibroin (SF) with mechanical properties similar to that of a native meniscus. SF is a natural protein, well known for its good biocompatibility and biodegradability but it has poor mechanical properties compared to synthetic polymers. SF contains proteins which can promote cell adhesion and cell proliferation required for a tissue engineering scaffold. PLA is a popular material that is widely used in tissue engineering. It provides high mechanical properties but lacks bioactivity and cell affinity. Thus, a PLA/SF composite scaffold can improve these drawbacks. In this study, PLA/SF nanofibers were fabricated using an electrospinning process at various PLA and SF ratios (PLA: SF 100:0, 75:25, 50:50, and 25:75). The SF content in the emulsion dominated the fiber diameter, fiber arrangement and processibility of nanofibrous scaffold. With increasing SF content, the %elongation at break of PLA/SF scaffold increased but Young’s modulus decreased. The wettability of electrospun PLA was increased with an increase in SF content.
Mechanical and thermal properties of NR/XSBR composite reinforced with rice husk silica
Authors: Bureewong Namthip , Ruksakulpiwat Yupaporn , Ruksakulpiwat Chaiwat 
Published: February 2022

Abstract
Natural rubber (NR) is a renewable resource that is used in many products. In the production of NR products, other rubbers or fillers may be used to produce a product with required properties. However, most rubbers and fillers are synthetic which are non-environmentally friendly materials. To solve this problem, rice husk ash (RHA) from biomass power plant was used to prepare silica to be used as a filler in rubber by in-situ generation. The purer RHA was prepared by leaching with HCl to remove some metallics and increase silica contents by combustion. The purer RHA was dissolved in NaOH to obtain sodium silicate from RHA (RSS). Carboxylated styrene-butadiene rubber (XSBR) used as synthetic rubber was blended with NR in latex form. NR/XSBR at the ratio of 2:1 was mixed with RSS to obtain NR/XSBR/RSS mixture. Acetic acid was dropped into the mixture until neutral for precipitating silica to obtain NR/XSBR/RSi composite. The mechanical, morphological, and thermal properties of NR/XSBR/RSi composites at different contents of silica (5, 10, and 15 phr) were studied. The NR/XSBR/RSi composite with optimum content was compared with NR/XSBR/CSi composite which prepared silica from commercial sodium silicate (CSS) on mechanical, morphological, and thermal properties.
Polyhydroxybutyrate/polylactic acid blends: An alternative feedstock for 3D printed bone scaffold model
Authors: Surisaeng Jiratchaya , Kanabenja Warrayut , Passornraprasit Nichaphat , Aumnate Chuanchom , Potiyaraj’ Pranut 
Published: February 2022

Abstract
In this research, we developed 3D printing filaments from polyhydroxybutyrate (PHB)/poly(lactic acid) (PLA) blends to further its use in a fused filament fabrication (FFF) 3D printing technique as an alternative feedstock for manufacturing bone scaffold model. The filaments were fabricated with blending ratios of PHB/PLA at 100/0, 90/10, 70/30, 50/50, 30/70, 10/90, and 0/100 %wt. using an extrusion process. Furthermore, 10 phr of polypropylene glycol (PPG) was added as a processing aid to enhance the processability. The results of MFR showed that the suitable temperature for 3D printing of all blended filaments is 190 °C. The changes in thermal properties indicate the partial compatibility between PHB and PLA in the blends. PLA plays a vital role in improving the mechanical properties of PHB. 3D printing filament from PHB/PLA blends has been successfully developed.
Development of Flame Retardant Property on Sodium Silicate Treated Paper Based Materials
Authors: Suttipintu Thitiporn , Lhosupasirirat Siraprapa , Osotchan Tanakorn , Srikhirin Toemsak 
Published: February 2022

Abstract
The preparation of cellulose-based flame retardant paper treated with sodium silicate and silicon dioxide (SiO2) colloidal particle by simple immersion process is reported. Cellulose-based paper was preheated at 90°C for surface preparation. The heat treated paper was immersed in solution of sodium silicate-SiO2 at different immersion time ranging from 15 min to 24 hrs. Treated solution diffused into paper coated on the paper fiber and filled the void in the paper microstructure. Treated paper was heated at 90°C to convert an impregnated sodium silicate-SiO2 precursor into silicate framework. The treated paper showed Vsym Si-O-Si from siloxane bond at 792 cm-1 which confirmed a presence of SiO2 in paper. Treated paper at 1 hr immersion showed the highest weight percent gain (WPG) of 40% and total combustion time was improved to 14 sec.
Spectral fiber dosimetry with beryllium oxide for quality assurance in hadron radiation therapy
Authors: Metzner E. , Bäumer C. , Behrends C. , Dammene Debbih A. , Döhler D.D. , van Goethem M.J. , van der Graaf E.R. , Kahle P. , Lühr A. , Teichmann T. , Timmermann B. , Weinberger D. , Werner T. , Wulff J. , Kormoll T. 
Published: February 2022

Abstract
Using the radioluminescence light of solid state probes
coupled to long and flexible fibers for dosimetry in radiotherapy
offers many advantages in terms of probe size, robustness and cost
efficiency. However, especially in hadron fields, radioluminophores
exhibit quenching effects dependent on the linear energy
transfer. This work describes the discovery of a spectral shift in
the radioluminescence light of beryllium oxide in dependence on the
residual range at therapeutic proton energies. A spectrally
resolving measurement setup has been developed and tested in scanned
proton fields. It is shown that such a system can not only
quantitatively reconstruct the dose, but might also give information
on the residual proton range at the point of measurement.
Development and evaluation of a thallium (I) bromide dosimeter for intracavitary radiotherapy quality assurance
Authors: Han M.-J. , Yang S.-W. , Jung J.-H. , Lee D.-H. , Kim J.-Y. , Cho S.-J. , Kim K.-H. , Mun C.-W. , Cho H.-L. , Park S.-K. 
Published: February 2022

Abstract
In intracavitary radiotherapy, incorrect source locations
can result in excessive doses to normal tissues. Therefore, it is
essential to accurately evaluate the source location. In this study,
we investigated a digital line dosimeter based on thallium (I)
bromide (TlBr) to improve the existing analogue verification
method. Therefore, a polycrystalline TlBr unit cell dosimeter was
manufactured, and the measurement performance of iridium-192
(Ir-192) sources was evaluated. We found that the dosimeter's
reproducibility satisfied the evaluation criteria of 1.5% with a
relative standard deviation of 1.44%. Moreover, the linearity
showed excellent results (linear coefficient, R
2 = 0.9999). The
distance dependence showed a difference of 0.03 cm at 50% intensity
when compared to the inverse square value, whereas the angular
dependence showed a large difference when compared to a diode. As
the angle increased, the intensity gradually decreased, resulting in
a difference of up to 41.9%. These results demonstrate the
excellent performance of the TlBr dosimeter. However, because of the
significant influence of angular dependence, a measurement distance
that minimises this error should be applied when manufacturing line
dosimeters in the future.
Bootstrapping Dirac ensembles
Authors: Hessam Hamed , Khalkhali Masoud , Pagliaroli Nathan 
Published: February 2022

Abstract
We apply the bootstrap technique to find the moments of certain multi-trace and multi-matrix random matrix models suggested by noncommutative geometry. Using bootstrapping we are able to find the relationships between the coupling constant of these models and their second moments. Using the Schwinger–Dyson equations, all other moments can be expressed in terms of the coupling constant and the second moment. Explicit relations for higher mixed moments are also obtained.
Volatile compounds in human breath: critical review and meta-analysis
Authors: Issitt Theo , Wiggins Laura , Veysey Martin , Sweeney Sean T , Brackenbury William J , Redeker Kelly 
Published: February 2022

Abstract
Volatile compounds contained in human breath reflect the inner workings of the body. A large number of studies have been published that link individual components of breath to disease, but diagnostic applications remain limited, in part due to inconsistent and conflicting identification of breath biomarkers. New approaches are therefore required to identify effective biomarker targets. Here, volatile organic compounds have been identified in the literature from four metabolically and physiologically distinct diseases and grouped into chemical functional groups (e.g. methylated hydrocarbons or aldehydes; based on known metabolic and enzymatic pathways) to support biomarker discovery and provide new insight on existing data. Using this functional grouping approach, principal component analysis doubled explanatory capacity from 19.1% to 38% relative to single individual compound approaches. Random forest and linear discriminant analysis reveal 93% classification accuracy for cancer. This review and meta-analysis provides insight for future research design by identifying volatile functional groups associated with disease. By incorporating our understanding of the complexities of the human body, along with accounting for variability in methodological and analytical approaches, this work demonstrates that a suite of targeted, functional volatile biomarkers, rather than individual biomarker compounds, will improve accuracy and success in diagnostic research and application.
Location Analysis Of Patrol Boat Fin Stabilizer Based On Numerical Method
Authors: Kusdiana Wawan , Semin  , Made Ariana I , Kusuma Cahya , Ali Baharudin 
Published: February 2022

Abstract
The fin stabilizer is located on the hull of the ship, one left and one right, which is connected to the fin stabilizer control room as a tool to respond to excessive ship rolling in both directions. In this study, we will analyze the ship resistance due to the addition of a fin stabilizer type Naca 0013 on patrol boats with variations in angles of 0°, 5°, 10°, 15° with speed variations of 25 - 30 knots. Calculation of ship resistance using Maxsurf modeler software and Numeca fine marine. In the early stages of validating the model that has been tested on a towing tank with a patrol boat design made using the Maxsurf modeler and Numeca fine marine. Validation results with a maximum error of 2.38% maxsurf software and 2% Numeca software. There was an increase in resistance due to the fin being installed at an angle of 0° by 0.56% - 1.22%, at an angle of 5° by 2.26% - 3.75%, at an angle of 10° by 6.48% - 9.49%, at an angle of 15° by 13.92% - 18.79 % of the total drag of the ship.
System Dynamics Modelling for a Sustainable Natural Gas Supply and Demand in Indonesia to Meet up the Additional Demand of 52 Converted Power Plants
Authors: Purwosaputra A A , Artana K B , Dinariyana A A B 
Published: February 2022

Abstract
US Trade Representatives at WTO had recently excluded Indonesia in the list of Least Developed countries. One of the reason behind the decision was that considering the potential economic of Indonesia that has consistently shown positive trend of growth. As the economic and population growth, the energy demand in Indonesia is also increasing over the time. Indonesia has an abundant natural gas reserves and in fact is the largest reserves in Southeast Asia. In line with the increasing of global awareness toward the sustainable development and environmental concerns, choices over an affordable source of energy with a less carbon footprint is inevitably. With the latest LNG technology, has made distribution even possible to reach remote areas of Indonesian archipelago. The Indonesian government had set up a strategy to promote the use of natural gas in power generation. The Ministerial Energy and Mining Resources Decree No. 13 K/13/MEM/2020 (Ministerial Energy and Mining Resources, 2020e) issued, January 2020, has mandated the state owned enterprise PERTAMINA to establish LNG supply within 2 years time frame to support the conversion of 52 power plants from diesel fueled to natural gas. This study, is offering stages of research, first is determining supply and demand of natural gas in Indonesia, and then conducting a market analysis. A market review analysis on gas supply and demand is done upon various sectors, ie power plants (in relation to additional demand for the conversion of 52 power plants), industries, transportation and households. From which, it will be analyzed, whether or not the gas supply meet the demand. The result of the simulation is revealing the fact that there will be deficit of supply starting sometime in 2031 (much earlier than Asia Pacific Energy Research Centre’s prediction by 2040), with short gap of about 55 MTPA by end of simulation time, thus if the Government is deciding to maintain the existing export commitment.
Ship production process monitoring application using QR-code technology
Authors: Arif Mohammad Sholikhan , Supomo Heri , Alifia Windha Umi , Wahidi Sufian Imam 
Published: February 2022

Abstract
Process monitoring of ship production in Indonesia is currently still using conventional methods. Ship production has stages, preparation to the erection. Each of these stages has results that need to monitor and their progress recorded. Therefore, it is necessary to have a system that fasts, practical, and responsive monitoring directly in the work area for actual conditions; one solution is a QR-code technology-based system. The design steps are making the basic framework, diagram of the relationship between entities, prototype design, central page division. These systems are formed in a website called Ship Building Monitoring Process based on QR-code SBMQ. Technical analysis is carried out by making applications, managing system security, creating business processes and operational systems, implementing them with simulations and trials. The trial application of the SBMQ website determines the contribution of implementing the website monitoring process of ship production. The trial was accompanied by the distribution of questionnaires from samples of shipbuilding practitioners. The SBMQ ship production monitoring system can accelerate review, tracking, and report verification assessment with practitioners is 3.125 with a good category.
Analysis of Mooring Line Tension in Floating Collar Net Cage
Authors: Adaalah A H , Prastianto R W , Murdjito  , Syalsabila F , Syarifudin M R 
Published: February 2022

Abstract
World fish production is increasing every year. This is mainly because of the trend to use floating net cages in aquaculture. One of the common net cage types is the collar cage. The net cage system must withstand the environmental and accidental loads, particularly on the mooring system as its function to maintain the position. Thus, this study focuses on analysis in mooring tension of the fully scaled net cage using numerical methods. The model scale data obtained from a previous experimental study and then scaled up to obtain the fully scaled net cage. After validation, current and wave data at Pangandaran bay, Indonesia is adapted to the simulation. Morison’s hydrodynamic force formula is used. Configuration of the mooring system is a rectangular array with a variation of spread angles of mooring lines between 90°, 60°, and 30°. The load cases used for simulation considering the operation and extreme conditions also the directions in lines and between lines. The result shows that the smallest mooring tension and offset is the configuration 30° in which the mooring lines spread evenly in each direction.
Numerical investigation on the effect of homogenous roughness due to biofouling on ship friction resistance
Authors: Regitasyali S , Aliffrananda M H N , Hermawan Y A , Hakim M L , Utama I K A P 
Published: February 2022

Abstract
Ships are subject to increased surface roughness due to the attachment of biofoulings on their hull. When the surface of a ship’s hull is rough, increased frictional resistance can be expected. A ship’s frictional resistance make up almost 80 – 85% of its total resistance. Therefore, it is crucial to maintain the ship’s frictional resistance value to a minimum. In this study, the effects of roughness length scale due to biofouling on friction resistance are investigated. To achieve reliable results, this study used the 3D DTMB 5415 model that was established as a benchmark study by ITTC. Roughness length scales representing biofoulings are applied to the model and analyzed by using the CFD software at a service speed, reaching a Froude Number of 0.28. Results of the simulation are compared and analysed to gain an understanding of the increased friction resistance value due to biofouling. For the smooth case, the results are in agreement with the towing test conducted by ITTC. In addition, friction resistance is found to be increasing along with the rise of the roughness length scale.
The Influence of NaCl dissolved on biodiesel of used cooking oil on performance and its degradation of main components of diesel engine
Authors: Fathallah Aguk Zuhdi Muhammad , Pinto Fransico 
Published: February 2022

Abstract
Biodiesel has been developed both domestically and abroad. Various studies have been conducted to determine the feasibility and capability of raw materials used cooking oil is replacing diesel oil in the future. The salt content in the raw material for biodiesel (new cooking oil and used cooking oil) could have a negative impact or even do not have a significant effect on the rate of wear of metal on the main components of the diesel engine. Through durability tests, the effect of salt (NaCl) on the main components of diesel engines has been tested. The new cooking oil biodiesel is used as a reference in examining the damage level of the main components of diesel engines. Results of the experiments showed that there is a difference between the use of biodiesel fuel from used cooking oil with new cooking oil such as lower diesel engine performance, carbon deposits generated higher, and degradation of metal elements on the main component in the diesel engine lubricating oil is higher
The Maintenance Task Allocation Analysis in Steam Power Plant: Case Study on Closed Cooling Water System
Authors: Siswantoro Nurhadi , Priyanta Dwi , Suminta Enggar Dywari , Zaman Muhammad Badrus , Pitana Trika , Prastowo Hari , Busse Wolfgang , Nurdiansyah Taufik Reza 
Published: February 2022

Abstract
The closed cooling system is one of the systems that functioned to ensure the cooling water supply can be continuously distributed and ensure that the production process does not cause the equipment or products to overheat, which can result in failure to the equipment and affect the production process due to downtime repair. Reliability Centered Maintenance (RCM) is one of the methods that can be used to analyze the cause of failure, impact, and determination of appropriate and effective maintenance tasks. The purpose of this research is to identify potential failures, determine the maintenance task and determine the optimal maintenance schedule in the closed cooling system of a steam power plant by using the Reliability Centered Maintenance method. The results of analysis on the closed cooling pump, heat exchanger, expansion tank, minimum flow valve, and level control valve obtained a total of 155 failure modes, of which 73% of total failure modes were identified as an evident failure and 27% identified as a hidden failure. While the results of the maintenance task recommendation obtained a total of 155 maintenance tasks which consists of 5 maintenance task categories. They are 88 (57%) of total failure modes recommended to scheduled on condition task, 38 (24%) scheduled restoration task, 20 (13%) scheduled discard task, 3 (2%) schedule finding failure, and 6 (4%) of total failure modes recommended to no scheduled maintenance.
A Case Study Maintenance Task Allocation Analysis on Marine Loading Arm Using Reliability Centered Maintenance
Authors: Siswantoro Nurhadi , Zaman Muhammad Badrus , Fahreza Feizar , Priyanta Dwi , Pitana Trika , Prastowo Hari , Wicaksana Adhitya , Fauzi Haris Nur 
Published: February 2022

Abstract
Marine Loading Arm (MLA) supports all liquid bulk loading and unloading activities, especially imports of chemical raw materials such as NH3, H2SO4, and H3PO4. Therefore, to minimize the occurrence of failure it is necessary to have a treatment method. Reliability Centered Maintenance (RCM) is a maintenance method that focuses on increasing the reliability of components in the system. The RCM uses the principle of risk management to determine tasks and maintenance schedules appropriately. The RCM process is implemented using American Bureau Shipping (ABS) Guidelines. According to the results of this research, there are three types of maintenance tasks for MLA, in which category A has 14 maintenance tasks, category B has 21 maintenance tasks, and there are no maintenance tasks in category C. In all maintenance categories for Preventive Maintenance by 54% with 19 tasks, for Condition Monitoring of 37% with 13 tasks, while for Run-To-Failure of 9% with 3 tasks.
Analysis of Bamboo Species Variation Effect Against Physical and Mechanical Properties of Laminate Bamboo Slat for Fishing Boat Construction Materials
Authors: Supomo H , Supomo W S , Setyanto T D , Solikhan Ariel M , Wachidi S I 
Published: February 2022

Abstract
Several studies on the mechanical properties of bamboo slats have been carried out using various types of bamboo species, including Dendro Calamus Asper sp, Gigantochloa Apus sp, Bambusa Arundinacea sp. Until now, variations and combinations of bamboo species have not been carried out, especially about physical and mechanical properties. This paper investigates the effect of variations in bamboo species on the physical and mechanical properties of laminated bamboo slats for ship construction. Each species of bamboo has advantages and disadvantages, which are expected with this combination will produce better physical and mechanical properties. The best value of shrinkage properties occurred in the variation of Bambusa Arundinacea sp with Gigantochloa Apus, namely 3.86 %. This variation also extends the highest mechanical properties: Tensile Strength: 151.9 Mpa; Flexure Strength MOR: 118.6 Mpa; MOE: 5.54 GPa. The Bambusa Arundinacea sp and Gigantochloa Apus hybrid perfectly meet the limit requirements according to the rules of BKI: 2013, Vol vii.