bluuebunny/crossref_metadata_2025_split huggingface dataset:
The experimental study of identification trigger components in ash deposits at the boiler pipe of the electric steam power plant in Nagan Raya, Aceh province
Authors: Syah A F , Gani A , Khairil  
Published: April 2020

Abstract
Coal energy is used as the greatest main source of power plant in this day and age. The consequence of the coal energy exertion is the ash deposits are cumulated in the used boiler. In this experiment, the fly ash and ash deposit are analyzed by using SEM/EDX (scanning electron microscope/energy dispersive x-ray) to obtain the tendency of the ash deposits with a base to acid ratio. the sample of ash deposit was selected at three layers of observation to discover the slagging index of the combustion process. The result of the study indicates that the tendency of the ash deposits is 0.959736 and the slagging index on three layers observation are 0.4987, 0.264183, and 0.140248. The result of the slagging index on three layers observation is categorized as low. The trigger compound of cumulation is K2O which is found more in the ash deposits around the pipe and constitutes in the lowest melting point compounds as compared to the other compounds contained in the slagging ash.
Properties of nanocrystalline cellulose from pineapple crown leaf waste
Authors: Fitriani  , Aprilia N A Sri , Arahman N 
Published: April 2020

Abstract
Nanocrystalline cellulose was extracted from pineapple crown leaf as agricultural waste. Nanocrystalline cellulose was successfully extracted using chemical treatments followed by acid hydrolysis using sulfuric acid. Hydrolysis of pineapple crown leaf was carried out by using different hydrolysis time while maintaining acid concentration and temperature. The properties of nanocrystalline cellulose were obtained such % yield, moisture content, crystallinity index (CrI) and functional group present were studied. The yield shown a comparable result regardless of different reaction time of hydrolysis. While Fourier transform infrared spectroscopy (FT-IR) showed the progressive removal of non-cellulose content and showed the cellulose molecular structure remains unchanged with the reaction time. X-ray diffraction (XRD) analysis revealed that the crystallinity increased linearly with increasing hydrolysis time. The result showed potential of pineapple crown leaf to be used in nanocrystalline cellulose synthesis process and optimum hydrolysis time was determined based on the properties of nanocrystalline cellulose.
SCOR Model for a Dual-Channel Supply Chain using Drop Shipping to Reduce Overstock in Small- and Medium-Sized Retail Enterprises
Authors: Francia-Arias G , Marín-Vílchez J , Macassi-Jauregui I , Raymundo-Ibañez C , Dominguez F 
Published: April 2020

Abstract
Sales are central to retail companies. One of the main problems for these companies is when products are sold later than expected, causing overstock due to lower inventory turnover, which increases inventory levels. Therefore, for many retailers, it is important to solve this problem. This is mostly applicable to companies engaged in sales; however, if we take into account the main supplier and the way they act within the supply chain, we must also consider an additional approach. Since online sales are a major innovation brought about by the new digital era, it is standard for sales strategies to focus on this new requirement of customers. In this way, the main supplier takes a leap forward on Internet sales, creating another sales channel. This is when companies under the supply chain start losing sales. According to the above, a dual supply chain model was suggested using the SCOR model and drop shipping. After the improvement proposal was implemented, the company reported a reduction of approximately S/13,000 when comparing the first quarter of 2018 to that of 2019.
The Effect of Stray Current from Sacrificial Anode Cathodic Protection (SACP) System on the Adjacent Unprotected Reinforcing Steel
Authors: Fonna S , Kurniawan R , Israr  , Fachri R , Huzni S 
Published: April 2020

Abstract
Concrete protects reinforcing steel from corrosion, but the steel may be corroded if exposed to coastal environment. Cathodic protection is a popular method to protect steel structures from corrosion. Previous researchers have conducted studies on sacrificial anode cathodic protection (SACP). However, the effect of stray current on the unprotected reinforcing steel in concrete was not reported. This study aims to analyze the effect of the stray current phenomenon on reinforcing steel which are not protected by SACP. Three types of specimens were used in the study: (1) unconnected anode-cathode, (2) connected anode-cathode, and (3) partially connected anode-cathode. The specimens were treated with 30 weeks of wet-dry cycle. Half-cell potential technique was used to measure corrosion potential. The results show that the first specimen had an average potential value of -505.44 mV, meanwhile the second specimen had average potential value -883.66 mV. According to ASTM C876 criteria, the first specimen is categorized into high corrosion risk. While, the second specimen was protected from corrosion based on NACE standard. However, the result on the third specimen shows that only the first reinforcing steel was protected from corrosion, while the other steels were categorized as severe corrosion risk level. The result on third specimen indicates that the stray current produced by SACP system could cause negative effect on the reinforcing steel by increasing susceptibility to corrosion, instead of protecting them.
Layout Lean model of production management based on change management to improve efficiency in the production of packaging in auto parts sector SMEs
Authors: Mancilla-Escobar J , Maccasi-Jaurequi I , Raymundo-Ibañez C , Perez M 
Published: April 2020

Abstract
This investigation proposes a lean model of production management for a small and micro enterprise (SME) dealing in packaging production in the auto parts sector, with the purpose of increasing efficiency in its production line. To this end, this model integrates study method tools and SMED, seeking to reduce waiting times and unnecessary operations, which have been identified as causing the problem on the basis of an initial diagnosis of the situation. Furthermore, to support and guarantee success in implementing these tools, John Kotter’s Change Model is used. After two months of implementation, the results showed a 50% reduction in setup operation time and a 32% decrease in filing operation time, which are bottlenecks in the production process. Thus, with the new indicators, the line efficiency increased by 7% from the initial situation, thus showing improvement.
LEAN maintenance model based on change management allowing the reduction of delays in the production line of textile SMEs in Peru
Authors: Arrascue-Hernandez G , Cabrera-Brusil J , Chavez-Soriano P , Raymundo-Ibañez C , Perez M 
Published: April 2020

AbstractThis article examines the problem of production line delays in a textile small- and medium-sized enterprise (SME) that produces polyester fibre from recycled bottles, based on orders. Factors that have resulted in production line delays include prolonged unscheduled maintenance time, and preparations and adjustments prior to operating the equipment. To address the problem, a model was developed applying lean manufacturing tools through change management, with the aim of increasing equipment availability and useful life. To validate the model, a pilot was developed to determine how the increase in equipment availability helps reduce delays in the production line, which eventually improves completion of customer orders.
Lean Manufacturing Production Management Model focused on Worker Empowerment aimed at increasing Production Efficiency in the textile sector
Authors: Sosa-Perez V , Palomino-Moya J , Leon-Chavarri C , Raymundo-Ibañez C , Dominguez F 
Published: April 2020

Abstract
For companies operating within the garment manufacturing industry, having frequent downtimes in their production flows is an extremely common issue. In this context, a balanced production line is required to prevent high waiting times due to limited productive capacity. A well-balanced assembly line allows products to be produced in an optimum time while using less resources, such as machines, materials, or labour, since the right number of products is produced with the exact amount of resources, thus generating savings in production costs. This paper seeks to foster optimum resource allocation through the line balancing tool. Finally, to define a work methodology, best practices were selected, and a procedures manual was developed focusing on Standardization. Both tools were implemented after implementing changes to the company culture by means of the Employee Empowerment tool. As a result of this implementation, workers acquired greater accountability and control over the resources, methods, and equipment of their work areas. After the proposed improvements had been deployed, the company reported an increase of over 20% in production line quality, performance, and efficiency.
Properties of blended cement paste with diatomite from Aceh Province Indonesia
Authors: Hasan M , Saidi T 
Published: April 2020

Abstract
This paper presents the properties of blended cement paste, i.e. water demand, setting time, flow, flexural strength and compressive strength with diatomite from Aceh Besar District, Aceh Province, Indonesia. Diatomite was calcined at the temperature of 500 °C for 4 hours, ground and sieved with sieve #200. The diatomite content used in this study was 0%, 10%, 20% and 30% of blended cement weight. The diatomite powder, cement, and water were mixed in a mixer to produce blended cement paste. EN and ASTM Standards were used for the test procedures. Water demand for normal consistency, setting time and flow was tested on freshly blended cement paste. Flexural and compression tests were performed on the 40 mm × 40 mm × 160 mm prism and 50 mm size cube specimens at the specimen age of 28 days. The test results show that the water demand increases with increasing the diatomite content. Initial setting time, flow and flexural strength decrease with increasing the diatomite contents. The use of 10 % and 20 % diatomite does not significantly alter the compressive strength.
Endophytic Bacteria isolated from the leaf of Langusei (Ficus minahassae Tesym. & De Vr.) and their antibacterial activities
Authors: Tallei T E , Linelejan Y T , Umboh S D , Adam A A , Muslem  , Idroes R 
Published: April 2020

Abstract
Endophytic bacteria colonizing the internal tissues of plants are being studied for its potential beneficial properties including antibacterial activity. The aims of this study were to identify the endophytic bacteria residing in the leaf of Ficus minahassae, a native plant of North Sulawesi, as well as their antibacterial activities against laboratory-adapted reference bacterial strains, Staphylococcus aureus, and Escherichia coli. The isolate identification was conducted using the 16S rRNA gene marker and the antibacterial activity test was done using a well diffusion method. A yellow-pigmented (designated as YL1) and a beige-pigmented (designated as YL2) bacteria were isolated from the internal tissue of langusei. Using the BLAST search, the isolate YL1 had a 100% identity with Brachybacterium muris, while YL2 has 99% identity with Pseudacidovorax intermedius. Ez-Taxon database confirmed that YL1 was B. muris with 99.81% similarity, while YL2 was P. intermedius with 99.80% similarity. Isolate YL2 was able to inhibit the growth of S. aureus but not E. coli. Isolate YL1 did not inhibit both reference bacteria. This study represents the first investigation of endophytic bacteria isolated from langusei leaf and their antibacterial activity.
Fabrication of Activated Charcoal from Coconut Shell Combined with Coal Fly Ash from PLTU Nagan Raya for Adsorption of Methylene Blue
Authors: Mariana  , Mulana F , Djuned Fauzi M , Fadli M , Meilian M 
Published: April 2020

Abstract
Coconut shell is one of the abundant agricultural solid wastes in Aceh Province. Meanwhile, a solid waste of coal fly ash is a by-product from PLTU Nagan Raya. Both coconut shell and coal fly ash have a great potential to be utilized as adsorbent. The aim of study is to prepare and characterize the adsorbent made from combination of coconut shell activated charcoal and coal fly ash. The prepared adsorbent was characterized using Scanning Electron Microscopy (SEM) to study the morphological structure, Fourier Transform Infra-Red Spectrophotometer (FTIR) to detect the functional group and X-Ray Diffraction (XRD) to determine the crystalline structure. Performance of adsorbent was carried out by adsorption process of methylene blue solution on adsorbent. The characterization results showed that all four types of the prepared adsorbents met the requirements of water content quality and iodine adsorption according to SNI 06-3730-1995 concerning to activated charcoal. It was obtained that adsorbent with the best performance was coconut shell activated charcoal (without addition coal fly ash) having the adsorption capacity to methylene blue of 45.36 mg/g on adsorption contact time of 140 minutes.
Production Of 5-Hydroxylimethylfurfural From Starch of Durian Seed (Durio zibhetinus) Through Dehydration Reaction Using Solvent-Based Choline Chloride: Glycerol
Authors: Manurung R , Zulkarnain I , Siregar A G 
Published: April 2020

Abstract
The energy demand is increasing and the production of fossil fuel is decreasing, which is a challenge for humans to produce eco-friendly renewable energy resources. Biomass is the raw materials of renewable energy. One of the plentiful biomass in Indonesia is the durian seed (Duriozibethinus). Durian production in Indonesia in 2014 reached 859.12 tons, where the weight of durian seeds 20-25% of total fruit weight. Durian seeds have a high content of starch which is 50.40%. 5-HMF (Hydroxymethylfurfural) is one of the most representative monomers of material based on biomass. 5-HMF can be synthesized from carbohydrates, in this case, durian seed is going through two stages of chemical reactions, those are hydrolysis and dehydration reaction. DES (Deep Eutectic Solvents) is a sub-class of IL (Ionic Liquids) that can be used as co-solvents in 5-HMF synthetic from durian seeds. This study applies DES-based Choline Chloride: Glycerol. The variables in this study are sulfuric acid concentration used in hydrolysis reactions and glucose mass ratio: DES, reaction time, glucose concentration in dehydration reactions. The reaction conditions with the highest yield were 61.93% with a glucose mass ratio: DES of 1: 5 and a reaction temperature of 80°C.
Photocatalytic Degradation of Organic Waste in Visible light using TiO2 Nanotubes Array
Authors: Kustiningsih Indar , Saripudin Cecep , Suwansih Siti , Sari Denni Kartika , Jayanudin  , Slamet  
Published: April 2020

Abstract
Photocatalytic degradation of organic waste using TiO2 nanotubes array has been investigated. The phenol was used as organic waste in this research. The Titania nanotubes were obtained by anodization method with 98% ethylene glycol and 0.5%wt NH4F as electrolyte solution at 50 V for 2 hours. The prepared catalysts were characterized by different techniques such as electron microscopy (SEM), X-Ray diffraction (XRD), Fourier transform infrared (FTIR) and UV-vis reflectance spectroscopy (UV-DRS). The effect of pH and initial concentration of phenol has been evaluated. The results showed that the best pH for degradation phenol was obtained at pH 5. In this condition, the phenol has been reduced from 40 ppm to 6.9 ppm for 180 min.
Distinct impact of order degree on thermoelectric power factor of p-type full-Heusler Mn2VAl compounds
Authors: Li Hezhang , Hayashi Kei , Dong Jinfeng , Li Jing-Feng , Miyazaki Yuzuru 
Published: April 2020

Abstract
Full-Heusler compounds have three crystal structures with a different order degree; the highly ordered L21, partially disordered B2, and completely disordered A2 structures. To reveal the effects of the order degree on thermoelectric (TE) properties of the full-Heusler compounds, Mn2VAl samples with varied L21 and B2 order degrees are prepared by changing preparation conditions, and their Seebeck coefficients and electrical conductivities are measured in a wide temperature range. As the B2 order degree becomes higher, the Seebeck coefficient increases, leading to the increase of the power factor (PF). The maximum PF is 2.84 × 10−4 Wm−1 K−2 at 767 K for the Mn2VAl sample with the highest B2 order degree. This study demonstrates that the TE properties of Mn2VAl can be enhanced by increasing the fraction of the B2 phase. A relation between the Seebeck coefficient and crystal structures is also discussed based on the calculation of the electronic density of states of Mn2VAl with the L21 and B2 structures.
Preparing and catalytic performance of a novel titanosilicate with FER topology
Authors: Yang Boting , Cui Tianxiao , Zhou Yuanyuan , Chen Huanming , Qin Jiahui 
Published: April 2020

Abstract
Ti-PLS-3, a kind of layered titanosilicates of FER topology was developed by hydrothermal synthesis with the help of using pure silica PLS-3 as seed. The Si/Ti ratio of this material can be adjusted in a wide range from 20 − ∞. The structure and active sites of Ti-PLS-3 were detected by various characterization. After mild acid treatment to eliminate the hexa-coordinated extra-framework Ti species, the resulting material turned out to be a more effective catalyst for epoxidation of 1-hexene with H2O2 than reported FER type Ti-containing material Ti-FER.
A system to test 2D optoelectronic devices in high vacuum
Authors: Zhao Qinghua , Carrascoso Felix , Gant Patricia , Wang Tao , Frisenda Riccardo , Castellanos-Gomez Andres 
Published: April 2020

Abstract
The exploration of electronic and optoelectronic properties of two-dimensional (2D) materials has become one of the most attractive line of research since the isolation of graphene. Such ‘all-surface materials’ present a strong sensitivity to environmental conditions and thus characterization of the devices based on these materials usually requires measurement systems operating in high-vacuum. However, conventional optoelectronic probe-station testing systems are are not compatible with high vacuum operation and vacuum-compatible versions are rather expensive. Here, we present a high vacuum system specifically designed to test electronic and optoelectronic devices based on 2D materials. This system can be implemented with low budget and it is mostly based on the assembly of commercially available standard vacuum and optic components. Despite the simplicity of this system we demonstrate full capabilities to characterize optoelectronic devices in a broad range of wavelengths with fast pumping/venting speed and possibility of modulating the device temperature (room temperature to ∼150 °C).
Suspicious for Malignancy Diagnoses on Pleural Effusion Cytology
Authors: Rodriguez Erika F , Pastorello Ricardo G , Morris Paul , Saieg Mauro , Chowsilpa Sayanan , Maleki Zahra 
Published: April 2020

Abstract

Objectives
A definitive diagnosis of malignancy may not be possible in pleural effusions. We report our experience with the diagnosis of suspicious for malignancy (SFM) in pleural effusion.

Methods
A search for pleural effusions diagnosed as SFM (2008-2018) was performed. Patient records and pathology reports were reviewed. Specimens were subdivided into groups depending on volume (&lt;75, 75-400, &gt;400 mL). Diagnoses of malignant pleural effusion (MPE) served as controls.

Results
We identified 90 patients, with a mean age of 60.6 years. Diagnoses included suspicious for involvement by carcinoma/adenocarcinoma in 64.4%, leukemia/lymphoma in 15.6%, melanoma in 2.2%, sarcoma in 3.3%, germ cell tumor in 1.1%, and not otherwise specified in 13.3%. Immunostains were performed in 47.8% and considered inconclusive in 24%. Average sample volume was 419 mL. There was a statistically significant difference between the SFM vs MPE groups for volumes greater than 75 mL (P = .001, χ 2 test), with SFM having increased proportion of volumes  greater than 400 mL, compared with the MPE group. There was no statistically significant difference in mean overall survival when the groups were compared (P = .49).

Conclusions
Samples with low cellularity, scant cell blocks, and inconclusive immunostains may contribute to a suspicious category diagnosis in pleural effusions.
Performance of PEth Compared With Other Alcohol Biomarkers in Subjects Presenting For Occupational and Pre-Employment Medical Examination
Authors: Neumann Jasna , Beck Olof , Helander Anders , Böttcher Michael 
Published: April 2020

Abstract

Aims
To compare the performance of short- and long-term alcohol biomarkers for the evaluation of alcohol drinking in employment-related health controls.

Methods
The 519 blood samples originated from 509 patients (80% men) presenting at occupational health units and medical centers at employment agencies for the evaluation of risky drinking. The laboratory investigation comprised the measurement of phosphatidylethanol (PEth 16:0/18:1), carbohydrate-deficient transferrin (CDT; % disialotransferrin), gamma-glutamyl transferase (GGT), mean corpuscular volume (MCV), ethanol and ethyl glucuronide (EtG).

Results
Many samples tested positive for acute (57%) and chronic (69%) alcohol biomarkers. PEth was the single most positive biomarker (64%; cut-off 0.05 μmol/l or 35 μg/l) and the only positive chronic biomarker in 100 cases. The highest PEth concentrations were seen in samples positive for all chronic biomarkers, followed by those also being CDT positive (cut-off 2.0%). All 126 CDT-positive samples were positive for PEth using the lower reporting limit (≥0.05 μmol/l) and for 114 cases (90%) also using the higher limit (≥0.30 μmol/l or 210 μg/l). In the CDT-positive cases, the PEth median concentration was 1.71 μmol/l, compared with 0.45 μmol/l for the CDT-negative cases (P &lt; 0.0001). PEth and CDT values were correlated significantly (r = 0.63, P &lt; 0.0001). Among the EtG-positive cases (≥1.0 ng/ml), 95% were also PEth positive, and all ethanol-positive cases (≥0.10 g/l) were also PEth positive.

Conclusions
For optimal detection of drinking habits, using a combination of short- and long-term alcohol biomarkers provided best information. PEth was the single most positive alcohol biomarker, whereas GGT and MCV offered little additional value over PEth and CDT.