bluuebunny/crossref_metadata_2025_split huggingface dataset:
Operator assignment model for minimizing total operator cost in a flexible flow shop environment
Authors: Maruf A , Zahra S , Isnaini M M 
Published: November 2019

Abstract
This research proposes a mix-integer linear programming model for operator assignment in a flexible flow shop environment. The objective is to minimize the total cost of operator transportation and operator exchange between machine. The model was developed considering practical constrain whereas machine are operated semi automatically, allowing an operator to be assigned to more than one machine in a certain period of time. Therefore, number of operator could be less than the number of machine. The proposed model result in a reduction up to 60% for operator transportation and operator exchange compared to current practice. Current output of proposed model will assign operator based on the number of available operator. Further research will be conducted by relaxing the number of operator to increase the operator utilization.
Human error analysis using sherpa and heart method in Batik Cap production process
Authors: Pratiwi I , Masita M , Munawir H , Fitriadi R 
Published: November 2019

Abstract
The batik industry is one of the creative industries which development keeps increasing every year. Almost all of Batik Cap production process activities are done manually. Therefore, production operators play an important role in influencing the quality of Batik Cap. This research was conducted to identify the human error factor that happened in the Batik Cap production process using SHERPA and HEART method. The potential for human error that occurs is described with SHERPA tabulation. The human error assessment is calculated using the HEART method of human error probability value that occurs in the production process operator. The result of this research is 26 potential errors of overall activity in 6 work stations divided into 19 error in action error, 5 error on checking error and 2 error in selecting error. The highest probability of human error value in stamping the work station on the fabric stamping activity.
Extraction of EEG signals using the discrete wavelet transforms
Authors: hindarto H , muntasa A 
Published: November 2019

Abstract
This study focuses on feature extraction for Electro Encephalo Graph (EEG) signals using the Discrete Wavelet Transform method. The EEG signal is used to move up the cursor and the down cursor. In each subband of the EEG signal wave the average value is taken to characterize the EEG signal. Backpropagation Neural Network is used as an EEG signal classification to determine whether the up cursor or the down cursor. The data used in this study are EEG data derived from BCI competition 2003 (BCI Competition 2003). Decision-making is done in two stages. In the first stage, the mean value of each wavelet subband is used as a feature extraction of the EEG signal data. This feature is an input to the Backpropagation Neural Network. In the second stage of the classification process into two classes of class 0 (for the up cursor) and class 1 (for the down cursor), there are 260 training data file of EEG and 293 signals from EEG signal data testing file, so the whole becomes 553 data files of EEG signals. The result obtained for EEG signal classification is 77.2% of the tested signal data.
Reliability test prototype wind turbine savonius type helical as an alternative electricity generator
Authors: Siregar A M , Siregar C A 
Published: November 2019

AbstractThe consumption of energy in the world today is still dominated by fossil fuels that will gradually run out. This period we must utilize renewable energy sources. One source of renewable energy that is environmentally friendly and we can use is wind energy. Wind turbines can be used to generate electrical energy so that it can solve one of the energy problems for people in need. A suitable wind turbine at low wind speed and medium wind speed is a type of Savonius turbine. The development of research is made prototype wind turbine. This test is carried out on a prototype of a vertical axis type wind turbine and aluminum flask. The rotor has a diameter of 350 mm and a height of 440 mm. The measured parameters were wind speed, rotation speed of rotor, voltage, and current of the generator. The performance of wind turbine savonius in this test at wind speed 4 m / s up to 6 m / s, maximum rotation of turbine shaft 35,40 rpm, electric power 6.94 watts at 6 m / s, at 6 m / s wind speeds produce wind power of 18.65 watts and produce electrical power of 6.94 watts.
An effect of different spark plug used and additional ethanol on engine performance and exhaust gas emission
Authors: Sarjito  , Prasetyo I , Riyadi T W B , Anggono A D , Effendy M 
Published: November 2019

Abstract
The existence of fossil fuels is increasingly scarce nowadays. Therefore, finding alternative fuels to substitute petroleum fuels, especially gasoline that very huge used for a motor vehicle. One of the alternative fuels as a substitute for gasoline is bioethanol (BE). The aim of the research work was to analyze engine performance and exhaust emission level of vehicle using two different types of spark plug. Further investigation was addressed by varying additional bioethanol fuel made from raw material of cassava. The work was carried out experimentally both in the laboratory and engine test drive. The results show that by using platinum spark plug resulting better performance of engine. The additional bioethanol on fuel, the power, and torque generated from the engine increases with the increase of percent bioethanol in the fuel mixture. The fuel consumption is more efficient by using fuel of 30% BE, compared with engine operation using fuel of 100% pertalite. While the results of the exhaust emission on the vehicle show that by using fuel bioethanol, exhaust emissions decrease as the increase of bioethanol in fuel mixture than exhaust emissions generated when using fuel 100% pertalite. It was proved by statistical data analysis using a one-way ANOVA Varian (F test) for power, torque, and HC emission levels, found of F value less than F table. Therefore hypothesis null (Ho) was accepted. Further result in each variation of fuel there is no significant difference. However, for CO, found that counted F greater than F table, then Ho was rejected; therefore the result of each variation of fuel there is significantly different.
Convective heat transfer of nanofluids TiO2/Thermo Oil XT 32 in concentric tube heat exchanger
Authors: Suroso B , Kamal S , Kristiawan B , Irawansyah H , Wibowo B S , Yani M 
Published: November 2019

Abstract
This research was conducted to examine the heat transfer characteristic of nanofluids TiO2/Thermo XT 32 oil on a concentric tube heat exchanger. TiO2 nanoparticles with nominal diameter of 21 nm were dispersed in Thermo XT 32 oil as base fluid at three different particles concentration of 0.1%, 0.3%, and 0.5%, respectively. A straight horizontal stainless-steel tube of 1.2 m length, 0.012 m inner diameter, and 0.022 m outer diameter were used as a test section. Collecting data by varying the temperature of the heat transfer nanofluids and nanoparticle volume fraction. Nanofluids prepared using the method of two steps without the addition of a surfactant by using a magnetic stirrer for 1 hour then ultrasonic cleaner for 3 hours. The results of research conducted, the coefficient convection heat transfer of nanofluids TiO2/Thermo XT 32 oil increases along with the addition of fraction volumes; this is due to the increased thermal conductivity of the fluid as well with the rise of temperature against nanofluids TiO2/Thermo oil XT 32. So it is very worthy of nanofluids applied in industries related to heat transfer processes.
Influence of tool speed on the friction stir welding joint of aluminium and steel with single weld line
Authors: Sugito B , Hariyanto A , Anggono A D , Subroto  , Darmawan A S 
Published: November 2019

Abstract
The objective on this research is to investigate the influence of tool rotation to the welding strength of Aluminium and Steel. AA1100 and ST37 were material selected for the specimens. The welding process was conducted by using Friction Stir Welding (FSW) method. The tensile strength and hardness of the specimens will be indicators of welding strength. FSW was carried out by using conventional milling machine with tool rotation of 800 rpm and 1250 rpm. Feed rate 10 mm/minute for all process. The tool tilt angle was 1° and 1.8 mm of depth plunge. By using 800 rpm, the average of Tensile Stress was delivered of 82.22 MPa and Strain of 1.09%. While for the use of 1250 rpm, Tensile Stress given 96.23 MPa and Strain 1.14%. The hardnes of HVN on the weld zone was 42.2 and 56.2 HVN for rotation of 800 and 1250 rpm respectively. Based on the Tensile Stress and the Hardness of the weld zone, the FSW process was influenced by tool rotation. The higher rotation given higher Tensile strength.
Strength of polymeric foam composite reinforced oil palm empty fruit bunch fiber subjected to impact load
Authors: Yani M , Siregar M A , Suroso B , Arnita  
Published: November 2019

Abstract
The subjects of this study were polymeric foam (PF) composites reinforced oil palm empty fruit bunches (OPEFB) fiber to dynamic load. OPEFB is waste of Palm Oil Mill which large number. This waste is seen has good potential to be harnessed and developed to become the engineering materials. This composite is processed with mixing of polyurethane (PU) and polyester resin. The paper aims to find the density of PF composite reinforced OPEFB fiber and to investigate the mechanical properties due to dynamic load. The specimens were prepared following the ASTM D1621-00 impact test standard. The method of making the test specimen is done by casting. The ratio of PU and mixing of polyester resin and OPEFB is 45 %: 65%. The results are gotten density 630 kg/m3, at a level test of 0.5 m the magnitude of the tension that occurs is 226.68 kPa, the average energy absorbed is 75.20 Joule and at the level test of 1m, the magnitude of the tension is 261.43 kPa, the absorbed energy is 184, 68 Joule.
Anisotropic infrared light emission from quasi-1D layered TiS3
Authors: Khatibi Ali , Godiksen Rasmus H , Basuvalingam Saravana Balaji , Pellegrino Daniele , Bol Ageeth A , Shokri Babak , Curto Alberto G 
Published: November 2019

Abstract
Atomically thin semiconductors hold great potential for nanoscale photonic and optoelectronic devices because of their strong light absorption and emission. Despite progress, their application in integrated photonics is hindered particularly by a lack of stable layered semiconductors emitting in the infrared part of the electromagnetic spectrum. Here we show that titanium trisulfide (TiS3), a layered van der Waals material consisting of quasi-1D chains, emits near infrared light centered around 0.91 eV (1360 nm). Its photoluminescence exhibits linear polarization anisotropy and an emission lifetime of 210 ps. At low temperature, we distinguish two spectral contributions with opposite linear polarizations attributed to excitons and defects. Moreover, the dependence on excitation power and temperature suggests that free and bound excitons dominate the excitonic emission at high and low temperatures, respectively. Our results demonstrate the promising properties of TiS3 as a stable semiconductor for optoelectronic and nanophotonic devices operating at telecommunication wavelengths.
Non-linear convection flow of micro polar nanofluid past an isothermal sphere
Authors: Ibrahim Wubshet , Zemedu Chaluma 
Published: November 2019

Abstract
In this study, steady laminar two dimensional boundary layer flow of non-linear convection micropolar nanofluid over an isothermal sphere is examined. The mathematical developing for the flow problem has been made. By means of appropriate similarity transformation and dimensionless variable, the governing non-linear boundary value problems were reduced into combined high order non-linear ordinary differential equations. Then, solution for velocity, microrotation, temperature and concentration has been obtained numerically. The equations were calculated using method bvp4c from matlab software for various quantities of main parameters. The influences of diffident parameters on skin friction coefficient, wall duo stress coefficient the Nusselt number, Sherwood number as well as the velocities, temperature, and concentration are analyzed and discussed through the tables and plotted graphs. A comparison with previous paper obtainable in the literature has been performed and an excellent agreement is obtained. The finding results indicate the raise in either the values of thermal Grashof number Gr or Brownian motion parameter Nb or Schmidt number Sc allows to bringing down the kinematic viscosity of the fluid causes improve the temperature profile distribution within the boundary layer. On the other hand, it can be diminished by the growth in either the value of solutal Grashof number Gm or solutal non linear convection parameter s which agrees to enlarge fluid density.
Colors of the Past: Archive, Art, and Amnesia in a Digital Age
Authors: Das Santanu 
Published: November 2019

Abstract
This roundtable offers four diverse perspectives on Peter Jackson’s innovative and controversial World War I documentary film They Shall Not Grow Old (2018). Jackson’s film breaks the mold of the documentary genre in its manipulation and montage of the visual and audio archives held at the Imperial War Museum in London. Yet he puts his technical virtuosity and resources at the service of a very traditional interpretation of the war, focusing almost entirely on the experience of young Englishmen on the Western Front. Scholars Santanu Das, Susan R. Grayzel, Jessica Meyer, and Catherine Robson offer their reflections on both the gains and losses of Jackson’s paradoxical original use of historical documents and old-fashioned rendering of the war’s experiential elements. They consider, respectively, the experience of colonial troops, the place of women in the war, and Jackson’s creative, if controversial, interpretation of the visual and aural archive.
The Anatolian glacial refugium and human-mediated colonization: a phylogeographical study of the stone marten (Martes foina) in Turkey
Authors: Arslan Yağmur , Demi̇rtaş Sadik , Herman Jeremy S , Pustilnik Jeremy D , Searle Jeremy B , Gündüz İslam 
Published: November 2019

AbstractThe Anatolian Peninsula, comprising most of modern Turkey, is situated at the junction of Europe, the Middle East and Asia. Together with its complex geomorphological and climatic history, this has given rise to a rich fauna and flora, which exhibits a wide range of historical biogeographical patterns. The stone marten (Martes foina) is a small carnivore that is found across the temperate Palaearctic region including Anatolia, where it is often associated with habitats modified by humans, but few genetic data exist for this species. We sequenced a 1840-bp region of the mitochondrial genome from 97 martens sampled across the peninsula and intron 7 of the nuclear β-fibrinogen gene from 53 of these. Two mitochondrial lineages were recovered, with overlapping eastern and western distributions, but there was no geographical structure for the autosomal marker. Coalescent analyses indicated that both of the lineages originated during the Last Glacial Maximum, one of them within an eastern Anatolian refugium and the other in a western Anatolian or Balkan refugium. The western lineage colonized most of Europe in the Holocene, while the eastern lineage may be endemic to Anatolia, from where it colonized the Iberian Peninsula via human translocation. The presence of at least one refugial stone marten population highlights the importance of Anatolia to the preservation of genetic variation and biodiversity.
Risk factors for major adverse kidney events in the first year after acute kidney injury
Authors: See Emily J , Toussaint Nigel D , Bailey Michael , Johnson David W , Polkinghorne Kevan R , Robbins Raymond , Bellomo Rinaldo 
Published: November 2019

Abstract

Background
Acute kidney injury (AKI) survivors are at increased risk of major adverse kidney events (MAKEs), including chronic kidney disease (CKD), end-stage kidney disease (ESKD) and death. High-risk AKI patients may benefit from specialist follow-up, but factors associated with increased risk have not been reported.

Methods
We conducted a retrospective study of AKI patients admitted to a single centre between 2012 and 2016 who had a baseline estimated glomerular filtration rate (eGFR) &gt;30 mL/min/1.73 m2 and were alive and independent of renal replacement therapy (RRT) at 30 days following discharge. AKI was identified using International Classification of Diseases, Tenth Revision codes and staged according to the Kidney Disease: Improving Global Outcomes criteria. Patients were excluded if they were kidney transplant recipients or if AKI was attributed to intrinsic kidney disease. We performed Cox regression models to examine MAKEs in the first year, defined as the composite of CKD (sustained 25% drop in eGFR), ESKD (requirement for chronic RRT or sustained eGFR &lt;15 mL/min/1.73 m2) or death. We examined secondary outcomes (CKD, ESKD and death) using Cox and competing risk regression analyses.

Results
We studied 2101 patients (mean ± SD age 69 ± 15 years, baseline eGFR 72 ± 23 mL/min/1.73 m2). Of these, 767 patients (37%) developed at least one MAKE (429 patients developed CKD, 21 patients developed ESKD, 375 patients died). MAKEs occurred more frequently with older age [hazard ratio (HR) 1.16 per decade, 95% confidence interval (CI) 1.10–1.24], greater severity of AKI (Stage 2 HR 1.38, 95% CI 1.16–1.64; Stage 3 HR 1.62, 95% CI 1.31–2.01), higher serum creatinine at discharge (HR 1.04 per 10 µmol/L, 95% CI 1.03–1.06), chronic heart failure (HR 1.41, 95% CI 1.19–1.67), liver disease (HR 1.68, 95% CI 1.39–2.03) and malignancy (non-metastatic HR 1.44, 95% CI 1.14–1.82; metastatic HR 2.26, 95% CI 1.80–2.83). Traditional risk factors (e.g. diabetes and cardiovascular disease) had limited predictive value.

Conclusions
More than a third of AKI patients develop MAKEs within the first year. Clinical variables available at the time of discharge can help identify patients at increased risk of such events.
Sensitivity of chest ultrasound for postoperative pneumothorax in comparison to chest X-ray after lung resecting surgery
Authors: Galetin Thomas , Defosse Jérôme , Schieren Mark , Marks Ben , Lopez-Pastorini Alberto , Koryllos Aris , Kosse Nils , Wappler Frank , Stoelben Erich 
Published: November 2019

Abstract

OBJECTIVES
Thoracic ultrasound is superior to chest X-ray for the detection of a pneumothorax in trauma and intensive care medicine. Data regarding its use in non-cardiac thoracic surgery are scarce and contradictory. Previous studies are heterogeneous regarding sonographic methodology and patient selection. This study aimed to evaluate the accuracy of thoracic ultrasound for pneumothorax assessment after lung resecting surgery in unselected patients.

METHODS
SONOR (SONOgraphy vs x-Ray) is a prospective observational trial (registry-ID DRKS00014557). A total of 123 consecutive patients with lung resecting surgery received a standardized thoracic ultrasound the same day and in addition to routine chest X-rays in erect position after removal of the chest tube. The sonographer was blinded to radiological findings and vice versa.

RESULTS
Sensitivity, specificity, positive and negative predictive values of ultrasound after removing the chest tube were 0.32, 0.85, 0.54, 0.69 for any pneumothorax and 1.0, 0.82, 0.19, 1.0 for pneumothorax ≥3 cm. No clinically relevant pneumothorax was missed. The agreement between sonography- and routine-based therapeutic decisions was 97%. Lung pulse was the most frequently detected sign to sonographically rule out a pneumothorax.

CONCLUSIONS
Postoperative thoracic ultrasound in unselected patients has a low overall sensitivity to detect a residual pneumothorax; however, its sensitivity and negative predictive values regarding clinically relevant pneumothorax are high. Test quality depends on the distinct sonographic methodology and patient selection. Anatomic differences in postsurgical and medical patients may be responsible for the contradictory results of previous trials. Studies with a larger population size are required to validate the accuracy of relevant pneumothoraces and identify appropriate selection criteria.

Clinical trial registration number
DRKS—German Clinical Trials Register, www.drks.de, registry-ID DRKS00014557.
Education and training in public health: is there progress in the European region?
Authors: Laaser Ulrich , Bjegovic-Mikanovic Vesna , Vukovic Dejana , Wenzel Helmut , Otok Robert , Czabanowska Katarzyna 
Published: November 2019

Abstract

Background
The Association of Schools of Public Health in the European Region (ASPHER) is confronted with challenges to improve education for public health professionals. In this article, we attempt to answer the question: Did ASPHER members improve their organization and programmes to enable their graduates to acquire the competences to tackle the diverse areas of public health defined in the Ten Essential Public Health Operations (EPHOs)?

Methods
ASPHER run two surveys among its membership: In 2011, 66 Schools and Departments of Public Health (SDPHs) took part (82.5%), while in 2015–16, 78 SDPHs (81.3%). The performance of graduates was estimated using a Likert scale.

Results
In 2015–16, the SDPHs delivered 169 academic programmes (2.2 on average per SDPH). Among the SDPHs participating in both surveys, significant differences could not be determined, neither for the organization (except increasingly using social media) nor for teaching areas. The performance of graduates did not show significant differences except for the deterioration of EPHO-8 (‘assuring sustainable organizational structures and financing’). However, the qualitative data revealed progressive dynamics regarding innovations in the organizational set-up, digitalization, teaching/training, introduction of new modules and research.

Conclusions
The results generated do not allow us to state that the innovative elements introduced after the first survey in 2011 have had a clear impact reflected in the second survey carried out in 2015–16, but perhaps this is due to the need for a broader follow-up in order to objectify the potential consequences derived from the boost generated by the changes introduced.